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Equations Of Motion Free Doubts and Solutions

CBSE - IX - Physics - Motion

fourth equation of motion with respect to distance and time  

Asked by bymks.220 15th March 2019, 6:47 PM
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CBSE - IX - Physics - Motion

Derive the equation s=ut+1/2 at2 for uniform accelerated motion on linear path by graphical method  

Asked by ayanjiyeja28 5th October 2018, 10:46 AM
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CBSE - IX - Physics - Motion

quations related to the second equation of moti  

Asked by shraybhardwaj112 12th July 2018, 4:52 PM
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CBSE - IX - Physics - Motion

A man running with a uniform speed 'u' on a straight road observes a stationary bus at a distance 'd' ahead of him. At that instant, the bus starts with an acceleration 'a'. The condition that he would be able to catch the bus is?

Asked by adityaahuja099 11th October 2017, 7:16 PM
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CBSE - IX - Physics - Motion

A bus is moving with a constant velocity 10m/s on a straight road. A scooterist wishes to overtake the bus in 100s. If the bus is at a distance pf 1km from the scooterist, then the velocity with which scooterist should chase the bus is?

Asked by adityaahuja099 11th October 2017, 7:01 PM
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CBSE - IX - Physics - Motion

Q) A car travelling at 60km/h overtakes another car travelling at 42km/h. Assuming each car to be 5m long. Find the time taken during the overtake.

Asked by banerjee_milky 6th July 2017, 9:41 PM
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CBSE - IX - Physics - Motion

Q4.  A particle is moving in astraight line with intial velocity u and uniform acceleration f. if the sum of the distances travelled in t th sec and and (t+1)th seconds in 100 cm , then it velocity after t seconds in cm/sec is 

Asked by vikasg13.hardware 23rd June 2017, 12:58 PM
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CBSE - IX - Physics - Motion

Q3.  A body covers 200cm in the first 2sec and 220cm in next 4sec. What is the velocity of the body at the end of 7th second.

Asked by vikasg13.hardware 23rd June 2017, 12:57 PM
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CBSE - IX - Physics - Motion

 
Q2.  A stone weighing 3kg from the top of a tower 100 meter high and burries itself 2m deep in the sand. the time of penetration is
 

Asked by vikasg13.hardware 23rd June 2017, 12:55 PM
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CBSE - IX - Physics - Motion

Drive the second equation of motion graphically
 

Asked by Lokesh 7th June 2017, 10:08 AM
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CBSE - IX - Physics - Motion

Take a metre scale and a large rope.walk from one corner of a basketball court to its opposite corner along its sides.measure the distance covered by you and magnitude of the displacement.what difference would you notice between the two in this case.
 

Asked by ABHILASHA 26th May 2017, 1:37 PM
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CBSE - IX - Physics - Motion

Describe simple pendulum
 

Asked by Subham 15th March 2017, 2:26 PM
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CBSE - IX - Physics - Motion

A moving train is brought to rest within 20 seconds by applying brakes. Find the initial velocity if retardation due to applying brakes is 2 m/s2.

Asked by Topperlearning User 9th November 2016, 3:51 PM
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CBSE - IX - Physics - Motion

An object starting from rest undergoes an acceleration of 10 m/s2. Find the distance travelled in 5 seconds.

Asked by Topperlearning User 9th November 2016, 3:51 PM
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CBSE - IX - Physics - Motion

A ball A is dropped from a 44.1 m high cliff. Two seconds later, another ball B is thrown downwards from the same place with some initial speed. The two balls reach the ground together. Find the speed with which ball B was thrown. 

Asked by Topperlearning User 9th November 2016, 3:51 PM
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CBSE - IX - Physics - Motion

On a 120 km long railway track, a train travels thre first 80 km at a uniform speed of 160 km/h. Calculate the speed with which the train should move rest of the track so as to get the average speed of 80 km/h for the entire trip.

Asked by gpnkumar0 21st September 2016, 6:37 AM
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CBSE - IX - Physics - Motion

TWO BODIES OF MASSES M1 AND M2 ARE DROPPED FROM HEIGHTS H1 AND H2 RESPECTIVELY.THEY REACH THE GROUND AFTER TIME T1 AND T2 RESPECTIVELY.WHICH OF THE FOLLOWING RELATION IS CORRECT?
 

1.T1/T2=[H1/H2]1/2

2.T1/T2=H1/H2

3.T1/T2=[M1/M2]1/2

4.T1/T2=M1/M2

Asked by gpnkumar0 28th June 2016, 6:47 PM
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CBSE - IX - Physics - Motion

A train 100 m long travelling at 40 m/s,overtakes another train 200 m long travelling at 30 m/s.Find the time taken by the first train to overtake the second train ?

Asked by gpnkumar0 27th June 2016, 8:36 PM
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CBSE - IX - Physics - Motion

Retardation produced, due to brakes; in a moving train is 0.5 m/s2. Train stops after 40s after application of brakes. If the train is to stop on a certain place on platform, what should be the distance from platform, of a place where brakes are applied?

Asked by Topperlearning User 17th June 2016, 3:07 PM
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CBSE - IX - Physics - Motion

Derive the equations of uniformly accelerated linear motion using algebraic method.

Asked by Topperlearning User 17th June 2016, 2:13 PM
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CBSE - IX - Physics - Motion

Two balls are thrown vertically upwards with their initial speeds in the ratio 1:2. Find the ratio of their maximum heights.

Asked by Topperlearning User 16th June 2016, 5:42 PM
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CBSE - IX - Physics - Motion

Prove that if a body is thrown vertically upward, the time of ascent is equal to the time of descent.

Asked by Topperlearning User 16th June 2016, 5:41 PM
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CBSE - IX - Physics - Motion

Write the equations of motion and state their essential conditions.

Asked by Topperlearning User 16th June 2016, 5:39 PM
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CBSE - IX - Physics - Motion

A ball is gently dropped from a height of 20m. If its velocity increases uniformly at the rate of 10m/s2  then with what velocity will it strike the ground? After what time will it strike the ground?

Asked by Topperlearning User 16th June 2016, 5:37 PM
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CBSE - IX - Physics - Motion

A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 6m/s2  for 4 seconds. How far does the boat travel during this time?

Asked by Topperlearning User 16th June 2016, 5:33 PM
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CBSE - IX - Physics - Motion

An object starts linear motion with a velocity 'u' and under uniform acceleration 'a' it acquires a velocity 'v' in time 't'. Draw its velocity time graph. From this graph obtain the following equations. (a) v = u + at (b) s = ut + ½ at2

Asked by Topperlearning User 16th June 2016, 5:09 PM
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CBSE - IX - Physics - Motion

Derive the first equation of motion v = u + at, using the velocity- time graph for a body moving along a straight line with uniform acceleration.

Asked by Topperlearning User 16th June 2016, 5:05 PM
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CBSE - IX - Physics - Motion

Derive the third equation of motion v2 - u2 = 2as using velocity-time graph.

Asked by Topperlearning User 16th June 2016, 5:04 PM
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CBSE - IX - Physics - Motion

(a) Draw the shape of velocity-time graph of a uniformly accelerated motion of a body. (b) Derive the velocity-position equation of motion (v2 = u2 + 2as) graphically (with the help of a velocity-time graph).

Asked by Topperlearning User 16th June 2016, 2:49 PM
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CBSE - IX - Physics - Motion

A particle moving in straight line experience constant acceleration for 20 second after starting from rest. If it travel a distance S1 in the first 10 seconds and distane S2 in the next 10 seconds then find the relation between S1 and S2

Asked by Hrishikesh marathe 13th June 2016, 7:35 AM
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CBSE - IX - Physics - Motion

please tell me how to identify in which questions which identity will be used please............................................................?

Asked by rajivjoshigoldtech 13th May 2016, 5:38 PM
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CBSE - IX - Physics - Motion

what is vector and scaler quantity

Asked by rajivjoshigoldtech 27th April 2016, 8:37 PM
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CBSE - IX - Physics - Motion

Derive the second equation of motion s = ut + (1/2)at2 using the velocity–time graph.

Asked by Topperlearning User 13th January 2016, 5:05 PM
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CBSE - IX - Physics - Motion

Can we write that,
Distance= Average Velocity x Time?

Asked by jhunjhunwalavansika 31st July 2015, 8:25 PM
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CBSE - IX - Physics - Motion

A body is moving along a straight line with a uniform acceleration ‘a’ and initial velocity ‘u’. The body reduces its velocity to (1/4)th of its initial velocity, calculate the total time of the motion of the body.

Asked by Topperlearning User 13th May 2015, 9:17 AM
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CBSE - IX - Physics - Motion

Asked by 4th April 2015, 12:23 PM
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CBSE - IX - Physics - Motion

A cyclist goes around a circular track once every three minutes. The radius of the circular track is 110 m; find the speed of the cyclist.

Asked by Topperlearning User 2nd January 2015, 1:23 PM
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CBSE - IX - Physics - Motion

a ball is thrown vertically upwards with avelocity of 49m/s. calculate the max.height to which it rise .

Asked by pramodkumarpv 12th October 2014, 8:55 PM
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CBSE - IX - Physics - Motion

when can we say the motion of an object is as uniform motion? what can be the shape of the path covered by a moving object to have uniform speed and uniform velocity?

Asked by nileshpatel19752000 21st September 2014, 9:17 PM
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CBSE - IX - Physics - Motion

A MAN IS STANDING AT THE TOP OF THE TOWER 100 m HIGH.HE THROWS A BALL VERTICALLY UPWARDS WITH A VELOCITY OF 20 m/s. AFTER WHAT TIME WILL THE BALL PASS HIM GOING DOWNWARDS ? HOW LONG AFTER IT'S RELEASE WILL THE BALL REACH THE GROUND ?
 
PL. ANS IN FULL STEPS

Asked by harshmandlik 9th September 2014, 10:45 PM
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CBSE - IX - Physics - Motion

A body is thrown vertically upwards with velocity u. The greatest height h to
which it will rise is;

Asked by Prakhar Paawan 26th August 2014, 10:45 AM
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CBSE - IX - Physics - Motion

WHY WE HAVE TO CALCULATE THE CHANGE IN VELOCITY IN THE 1St EQUATION OF MOTION?

Asked by mansi 10th July 2014, 7:04 PM
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CBSE - IX - Physics - Motion

A stone is allowed to fall down from the top of a tower 100m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 ms-1. Calculate when and where the two stones will meet? (take g = 10ms-2)

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A marble rolling on a smooth floor has an initial velocity of 0.4 m/s. If the floor offers a retardation of 0.02 m/s2, calculate the time it will take to come to rest.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A ball thrown up vertically returns to the thrower after 6s. Find : (a) The velocity with which it was thrown up. (b) The maximum height it reaches. (c) Its position after 4s.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A car accelerates uniformly from 18 kmh-1 to 36 kmh-1 in 5s. Calculate: (i) Acceleration (ii) distance covered by the car in that time.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A particle is thrown up vertically with a velocity of 50 ms-1. How high would the particle rise and what time would it take to reach the highest point? (g = 10ms-2)

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A stone is dropped from the roof of a building. It takes 4s to reach the ground. Find the height of the building. (g = 9.8 m/s2 )

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A car of mass 1800 kg moving with a speed of 10 m/s brought to rest after a covering a distance of 50m. Calculate the force acting on the car.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A ball thrown vertically upwards rises to a height of 20 m. Calculate: (i) the velocity with which the ball is thrown upwards and (ii) the time taken by the ball to reach the highest point. (g=10 m/ s2)

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A train starting from rest attains a velocity of 72 km/h in 5 minutes. Assuming the acceleration is uniform, find (i) The acceleration (ii) The distance travelled by the train for attaining this velocity.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A body is thrown vertically upwards with an initial velocity of 100 m/s. Find : (i) Time taken to reach maximum height (ii) Maximum height reached (iii) Velocity after 5 second Take g = 10 m/s2

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

If a stone is thrown vertically upwards to a height of 9.8m, calculate (i) the velocity with which it was thrown and (ii) time taken by it to reach the highest point. Take g = 10m/s2

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A ball is thrown vertically upwards and reaches a maximum height in 3 seconds. Find : (a) the velocity with which it was thrown upwards. (b) the maximum height attained by the ball.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A man throws a ball of mass 0.5 kg vertically upward with a velocity of 25 m/s. Find : (a) the initial momentum of the ball (b) momentum of the ball at the half way mark of the maximum height. (given g = 10 m/s2)

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

A motor boat starting from rest on a lake accelerates in a straight line at a constant rate of 6m/s2 for 6 s. How far does the boat travel during this time?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Physics - Motion

Starting from rest, Rehan paddles his bicycle to attain a velocity of 6 m/s in 30 s. Then, he applies brakes such that the velocity of the bicycle comes down to 4m/s in the next 5 s. Calculate the acceleration of the bicycle in both the cases.

Asked by Topperlearning User 15th May 2014, 10:40 AM
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CBSE - IX - Physics - Motion

An athlete traces a circular path of diameter 20 metre in a time period of 4 minutes. Find linear speed of the athlete along the circular path.

Asked by Topperlearning User 15th May 2014, 10:26 AM
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CBSE - IX - Physics - Motion

An object moving in a certain direction with acceleration in the perpendicular direction. Is this situation possible? Give an example of such situation.

Asked by Topperlearning User 15th May 2014, 10:20 AM
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CBSE - IX - Physics - Motion

1.a) Define uniform circular motion.    b) Can the uniform circular motion be termed as accelerated motion? Give reason.

Asked by Topperlearning User 15th May 2014, 10:03 AM
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CBSE - IX - Physics - Motion

The speed of a car is reduced from 60 kmph to 30 kmph over a displacement of 20 m. What is the acceleration of the car assuming to be constant?

Asked by Topperlearning User 10th April 2014, 6:59 AM
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CBSE - IX - Physics - Motion

Train starting from rest attains a velocity of 70 km/h in 10 minutes. Assuming that the acceleration is uniform, find the acceleration and the distance travelled by the train while it attained this velocity.

Asked by Topperlearning User 9th April 2014, 2:14 PM
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CBSE - IX - Physics - Motion

A bullet moving with 10m/s hits the wooden plank. The bullet is stopped, penetrates the plank 1 cm deep. What is the retardation of the bullet?

Asked by Topperlearning User 28th January 2014, 10:45 AM
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