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• CBSE×
• Class 11 Science×
• Physics×
• Motion In A Straight Line×
• Kinematics Of Linear Motion×

# Kinematics Of Linear Motion Free Doubts and Solutions

## 14th sum plz

Asked by lovemaan5500 22nd January 2019, 9:03 PM

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## Plz answer 4th part of 8th ques

Asked by lovemaan5500 17th January 2019, 6:12 AM

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## 13th sum plz

Asked by lovemaan5500 17th January 2019, 6:09 AM

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### CBSE - XI Science - Physics - Motion in a Straight Line

Asked by lovemaan5500 17th January 2019, 6:08 AM

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## IF A CAR start from rest and TRAVEL WITH CONSTANT acceleration for 10 second.find the ratio of distance in 1st and 2nd second  travel by car?

Asked by er.arunnegi 19th December 2018, 7:34 AM

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## a boat is moving in a river with velocity 6km/h ,(1)upstream(2)downstream .what is the resultant velocity of th boat if the velocity of the flow of water is 4km/h.

Asked by rajkumarimaravi85 17th August 2018, 9:03 AM

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## particle is moving in a straight line and has an acceleration of 3t-4 m/s2 at time t seconds. The particle is initially 1m from O a fuxed point with velocity 2m/s. Find displacement at t=3s

Asked by Rittwik Devdatta 21st July 2017, 9:13 AM

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## While studying vectors i came across a question in which i was required to calculate an angle i.e TAN BETA. Can anyone please tell the formula to calculate tan beta  thanks

Asked by swatee 17th July 2017, 4:47 PM

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## What is relative velocity?

Asked by Gurpreet 29th June 2017, 3:41 PM

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## A ball is thrown upwards from the ground with an initial speed of u. The ball is at a height of 80 m at two times. The time interval being 6 sec. Find u.

Asked by Anil 12th June 2017, 9:45 AM

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## A body is projected vertically upwards with a velocity of 10 m/s . It reaches the maximum height h in time t. In time t/2 ,height covered is   a) h/2   b) (2/5)h   c) (3/4)h   d) (5/8)h

Asked by Balbir 29th August 2016, 7:24 PM

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## A ball rolls horizontally off the top of a stairway with a speed of 1.5m/s. The steps are 20cm high and 20cm wide. Initially the ball hits 1. Second step 2. Third step 3. Fifth step 4. Sixth step

Asked by Mamali Nanda 21st July 2016, 10:13 PM

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## The body projected vertically with a speed of 25m/s. Then find the distance travelled by the body in 3rd second of its motion. g=10m/s2 1. 5m 2. 4m 3. 2.5m 4. zero

Asked by Mamali Nanda 16th July 2016, 8:00 AM

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## A ball is thrown vertically upwards with a velocity of 20m per second from the top of a multi storied building .The height of the point from where the ball is thrown is 25m from the ground . How high the ball will rise? how long will it be before the ball hits the ground ?[g=10m per second square]

Asked by Amy Jacob 9th July 2016, 8:56 AM

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## i wanted to ask    when we use difrentiation and integration while solving equation probelem in kinematics   i am getting confused   which to use    diffrentiation or integration  in problems in kinematics

Asked by sukalp 10th June 2016, 10:04 AM

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## A fooball is kicked off with an initial velocity of 64 ft/s at an angle of 45 degree. A goal-keeper at the goal-line, 180 ft away in the direction of hit, starts running uniformly to catch the ball at that instant. What must his speed be if he runs with uniform speed to catch the ball just before it hits the ground? [Given - g = 32 ft/s^2]

Asked by Sukrit Saha 27th May 2016, 1:52 PM

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## A bullet is fired into a fixed target loses half of its velocity after penetrating 3 cm. how much further will it penetrate before coming to rest assuming that it faces constant retardation?

Asked by Ravikant 18th November 2015, 9:14 PM

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## two buses start simultaneously towards each other from towns A and B which are 480km apart . it took first bus travelling from A to B 8 hrs and second bus travelling from B to A , 10 hrs.determine when the buses will meet after strting and at wht distance from A.

Asked by Sanmit Ratnaparkhi 4th September 2015, 11:58 PM

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## can u pls help .... i dont understad when to take g positive or negetive in ques . on motion under gravity.

Asked by Sanmit Ratnaparkhi 3rd September 2015, 9:29 PM

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## IF TWO OBJECTS GO PARALLEL TO EACH OTHER ALONG THE SAME DIRECTION IN A STRAIGHT LINE, WITH SAME VELOCITY, THEN WHAT IS THE RELATIVE VELOCITY BETWEEN THEM?

Asked by swarajtopper 4th August 2015, 4:39 PM

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## between a stone and the feather which would fall first in a chamber. won't it be the stone since the mass is heavier?

Asked by vanessa.fernz 20th July 2015, 1:12 PM

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## TWO PARTICLES 1 AND 2 MOVES WITH CONSTANT VELOCITIES v1 AND v2 .AT THE INITIAL MOMENT THEIR RADIUS VECTORS ARE EQUAL TO r1 AND r2.how must these four vectors be interrelated for the particles to collide

Asked by JAIBHARGAVA200 1st November 2014, 2:58 PM

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## A ball dropped from a height suffers inelastic  collision on reaching the ground. Plot the speed-time and velocity-time graph.

Asked by Sayoni Maiti 8th October 2014, 5:08 PM

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## if x,yand z are distances moved by a particle with a constant acceleration during lth , mth and nth second of its motion show that x(m-n)+y(n-l)+z(l-m)=0

Asked by pkgupta_nproofings 9th August 2014, 9:42 PM

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## a point moving with constant acceleration from Ato B in a straight line AB has velocities v and u at A and B respectively . find its velocities at c the mid point of AB . also show that if the time from A to C is twice that from C to B then u=7v

Asked by pkgupta_nproofings 9th August 2014, 9:34 PM

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## A body falling from a vertical height of 10 m pierces through a distance of 1 m in sand. Calculate the average retardation in sand faced by the body. ( g= acceleration due to gravity)  a)g  b)9g  c)100g  d)1000g

Asked by Sayoni Maiti 5th June 2014, 1:05 AM

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## An object thrown vertically up from the ground passes the height 5 m twice in an interval of 10 seconds. what is its time of flight?

Asked by Sayoni Maiti 5th June 2014, 12:57 AM

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## A ballon starts rising from ground from rest with an upward acceleration 2 m/s square. Just after 1 second, a stone is dropped from it. what is the time taken by the stone to strike the ground ?

Asked by Sayoni Maiti 5th June 2014, 12:53 AM

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## A ball is dropped from a bridge of 122.5 m above a river . after the ball has been falling for 2 seconds , a second ball is thrown straight down after it. what should be the initial velocity of the second ball so that both hit the water at the same time?

Asked by Sayoni Maiti 5th June 2014, 12:46 AM

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## In the graphic seen, find the (a) Speed of trolley with respect to person (2) (b) Speed of person (1) with respect to person (2).

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## A passenger is standing at a distance d meters from a bus. The bus begins to move with a constant acceleration a. To catch the bus, the passenger runs at constant speed u towards the bus. What should be the minimum speed of the passenger so that he may catch the bus?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## A car moves along x axis with constant acceleration= 2m/s2. At time t=0, the car is at position x= 4 m and has velocity =2m/s. a. Find the position and velocity at time t=2s. b. Where is the body when the velocity becomes 5m/s?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## A particle moves along a straight line such that its displacement at any time t is given by . Show that the acceleration is constant, and find the velocity of the particle at t=3 s.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## A stone is dropped from a height of 2000 m. After striking the ground it rebounds with a velocity half that of the velocity before striking. Find the maximum height reached after this rebound. Take.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## Velocity vs time graph of a particle moving along a straight line is shown.        What is the average acceleration between t = 4 s and t = 12 s?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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## Two cars A and B are moving  in same direction with velocities 30 m/s and 20 m/s respectively.when car A is at a distance d behind the car B, the driver of car A applies brakes producing uniform retardation of 2 m/s square . there will be no collision when -           a)d is lesser than 2.5 m         b)d is greater than 125 m         c)d is greater than 25 m         d)d is lesser than 125 m

Asked by Sayoni Maiti 4th June 2014, 10:39 AM

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## two cars are moving in the same direction with a speed of 30 km/h. they are seperated from each other by a 5 km. third car moving in the opposite direction meet the two cars after an interval of 4 minutes.find the speed of the third car.

Asked by Sayoni Maiti 4th June 2014, 10:27 AM

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## A worker drops a hammer from the top of a 60m high building. If the speed of sound in air is 340 m/s, how long does the worker have to shout down to warn colleagues (if his warning is to reach them before the hammer!) Neglect air resistance.

Asked by Topperlearning User 21st April 2014, 8:37 AM

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## Derive the following equation of motion from velocity - time graph:-

Asked by Topperlearning User 21st April 2014, 8:23 AM

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## An object starts from a point and moves on a smooth portion of land, where there is no friction. It then moves into an area with friction such that the retardation is . Find the total time and distance covered, before it stops.

Asked by Topperlearning User 21st April 2014, 8:17 AM

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## An object is hurled downwards with a speed of 10 m/s from a height of 200 m. Another object is thrown upwards with a speed of 40 m/s.   Find the position where they meet. Take a = .

Asked by Topperlearning User 21st April 2014, 8:14 AM

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## Derive velocity time formula for a uniformly accelerated motion along a straight line from a v-t graph.

Asked by Topperlearning User 21st April 2014, 8:05 AM

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## An object which is moving with a speed of u m/s applied brakes and achieves a retardation of magnitude 'a' m/s2. Find the distance it would cover before stopping.

Asked by Topperlearning User 21st April 2014, 8:00 AM

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## A ball is dropped from a height of 125 m. At the same instant, a man runs from A to catch the ball. With what speed should the man run?

Asked by Topperlearning User 21st April 2014, 7:57 AM

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## What do you understand by relative velocity?

Asked by Topperlearning User 21st April 2014, 7:50 AM