# Speed And Velocity Free Doubts and Solutions

### CBSE - IX - Physics - Motion

## What is the speed of seconds hand of your watch whose radius is 1.5 cm

**itishreepanda999**31st May 2018, 9:07 PM

### CBSE - IX - Physics - Motion

## an object completes one round of circle of radius 7m in 20s.. distance travel after 10s is??

**ujjwalviky2003**27th October 2017, 5:27 PM

### CBSE - IX - Physics - Motion

## If an object is changing its velocity at uniform rate from u to v taken time t , what will be the sum of average velocities and acceleration?

**ashishmaskara**25th July 2017, 3:25 PM

### CBSE - IX - Physics - Motion

## in case of an object moving with uniform velocity, the average velocity as per NCERT book is (U+V) /2. While as per your solution in the generated test taken on 24.07.2017, the average velocity is [u+v] / t in the question related to sum of average velocity and acceleration.
please clarify which is correct and why.

**ashishmaskara**24th July 2017, 10:25 PM

### CBSE - IX - Physics - Motion

##
A car is moving at a constant speed of 40km/h along a straight road which heads towards a large vertical well and makes a sharp 90 degree turn by the wall .a fly flying at a constant speed of 100km/h, starts from the wall towards the car at an instant when the car is 20km away, flies until it reaches the glass pane of the car and returns to the wall at same speed. it continues to fly between the car and the wall till the car makes the 90 degree turn .
(a) what is the total distance the fly has travelled during this period?
(b) how many trips has it made between the car and the wall?

**Jagriti**19th June 2017, 9:53 AM

### CBSE - IX - Physics - Motion

## Q.1. A quantity measured to be -30 m/s. Is it speed or velocity? Give a reason in your favour.

**sbidipak**30th May 2017, 4:04 PM

### CBSE - IX - Physics - Motion

## Give an example of the motion of a body moving with a constant speed but with a variable velocity. Draw a diagram to represent such a motion

**Topperlearning User**10th June 2016, 11:19 AM

### CBSE - IX - Physics - Motion

## Distinguish between average speed and average velocity.

**Topperlearning User**10th June 2016, 11:17 AM

### CBSE - IX - Physics - Motion

## Distinguish between uniform velocity and variable velocity.

**Topperlearning User**10th June 2016, 11:14 AM

### CBSE - IX - Physics - Motion

## Arrange the following speeds in increasing order. 10 m s-1, 1 km min-1 and 18 km h-1.

**Topperlearning User**10th June 2016, 11:08 AM

### CBSE - IX - Physics - Motion

## An object moves 18 m in the first 3 seconds and 22 m in the next 3 seconds while it travels 14 m in the last 3 seconds. Calculate the average speed.

**Topperlearning User**10th June 2016, 11:00 AM

### CBSE - IX - Physics - Motion

## Kalpesh, before going out, takes the reading of odometer of his motorcycle. It was 8,245 km. Driving at uniform velocity of 60 km/h for 30 min on a straight highway; he reaches his friend’s village. What would be the odometer reading of his motorcycle there?

**Topperlearning User**10th June 2016, 10:55 AM

### CBSE - IX - Physics - Motion

## Sam, while driving to school, computes the average speed for his trip to be 20 km/h. On his return trip along the same route, there is less traffic and the average speed is 30 km/h. What is the average speed for Sam’s trip?

**Topperlearning User**10th June 2016, 10:51 AM

### CBSE - IX - Physics - Motion

A moving body travels distance s with constant speed v_{1} and travels distance s with uniform speed v_{2}. Prove that his average speed is .

_{1}and travels distance s with uniform speed v

_{2}. Prove that his average speed is .

**Topperlearning User**10th June 2016, 10:49 AM

### CBSE - IX - Physics - Motion

## Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging (a) from A to B and (b) from A to C?

**Topperlearning User**10th June 2016, 10:20 AM

### CBSE - IX - Physics - Motion

## What is the speed of a sailboat that is traveling 100 meters in 120 seconds?

**Topperlearning User**10th June 2016, 10:08 AM

### CBSE - IX - Physics - Motion

## A scooter travels a distance of 600 m in 20 seconds southwards. (a) What is the speed of the scooter? (b) What is the velocity of the scooter?

**Topperlearning User**10th June 2016, 9:59 AM

### CBSE - IX - Physics - Motion

## A train moving with a uniform speed covers a distance of 1200 m in 20 s. Calculate (i) the velocity of the train (ii) the time taken to cover 3000 m.

**Topperlearning User**10th June 2016, 9:57 AM

### CBSE - IX - Physics - Motion

## A body travels from A to B in 10 seconds with a speed of 50 km/h and returns with a speed of 100 km/h in 5 s. Find the average speed. Also find the average velocity for the whole journey.

**Topperlearning User**10th June 2016, 9:53 AM

### CBSE - IX - Physics - Motion

## A body moves from point O to point A, and then to point B (to the east of O) in 5 s. What is the average speed and average velocity of the body?

**Topperlearning User**10th June 2016, 9:45 AM

### CBSE - IX - Physics - Motion

## If a cyclist has traveled a distance of 12,250 meters in one hour along the southwest direction, what would the velocity of the cyclist be?

**Topperlearning User**10th June 2016, 9:41 AM

### CBSE - IX - Physics - Motion

## During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 108 ms-1.

**Topperlearning User**10th June 2016, 9:35 AM

### CBSE - IX - Physics - Motion

## Explain average speed.

**Topperlearning User**9th June 2016, 12:37 PM

### CBSE - IX - Physics - Motion

## Can average speed of a body in motion be non-zero? Can its average velocity be zero?

**Topperlearning User**9th June 2016, 12:35 PM

### CBSE - IX - Physics - Motion

## CAN YOU EXPLAIN THE MAGNITUDE OF DISPLACEMENT

**pranjal**19th May 2016, 10:41 PM

### CBSE - IX - Physics - Motion

## A train starting from rest has velocity of 72 km/h in 5 min . Calculate the distance travelled.

**Anuradha**15th May 2016, 1:09 PM

### CBSE - IX - Physics - Motion

**A body moves with a velocity of 10 m/s. if the motion is uniform,what will be the velocity after 10 s.**

**A body moves with a velocity of 10 m/s. if the motion is uniform,what will be the velocity after 10 s.**

**swaijitsingh**12th May 2016, 6:54 PM

### CBSE - IX - Physics - Motion

## What is si unit of uniform motion?

**leenbindra**3rd May 2016, 8:27 PM

### CBSE - IX - Physics - Motion

## A pitcher throws his fast ball horizontally at 42.1 meters per second. How far does it drop before
crossing the plate, 18.3 meters away ?

**a.behera67**30th January 2016, 6:35 PM

### CBSE - IX - Physics - Motion

## A man travels some distance at a speed of 12km/hr and returned at 9km/hr. If the total time taken by the man is 2hrs and 20minutes. Find the distance

**surajsugitha**12th November 2015, 7:39 PM

### CBSE - IX - Physics - Motion

## <div>If an object travels in a circular path of radius R with constant angular speed <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=52c3f6b2894ffec375aa7a7ec8cd9673.png" alt="omega" align="middle" />. Find its displacement after time t.</div>

**a.behera67**22nd October 2015, 7:25 PM

### CBSE - IX - Physics - Motion

## a boy runs for 10 minutes at a uniform speed of 9km/hr.At what speed should he run for the next 20 minute so that the average speed comes to 12km/hr? expert, please tell me the procedure

**my3shyll**6th September 2015, 12:05 PM

### CBSE - IX - Physics - Motion

## a bus starting from rest moves with a uniform accelaration of 0.1 ms-2 for 2 minutes .find a. the speed acquired, b. the distance travelled.

**mahendra_soniya**3rd August 2015, 5:06 PM

### CBSE - IX - Physics - Motion

## a body standing near the edge of a cliff 125m above a river throws a stone downwards with a speed of 10m/s. Find -
(i) with what speed will the stone hit water and,
(ii) how long will it take to descend

**rahulsarawgee04**16th June 2015, 11:39 AM

### CBSE - IX - Physics - Motion

## (a) distance between delhi and agra is 200km. atrain travels thefirst 100km at the speed of 50km/h. how fast must the train travel next 100 km so as to average 70km/h for the whole joueney?
(b) ona 120 km track, a train travel the first 30 km at speed of 30 km/h how fast must the train travel the next 90km so as to average 60km/h for the entire tip?

**ahujarajesh11**14th June 2015, 3:22 PM

### CBSE - IX - Physics - Motion

##
A person being chased by a lion is running on a straight line towards his car
at a constant speed of 4m/s. The car is at a distance of d meters away from
the person. The lion is 26 m behind the person and running at a constant
speed of 6 m/s. The person reaches the car safely. What is the maximum
possible value of d?

**Atal Kumar**16th May 2015, 4:02 AM

### CBSE - IX - Physics - Motion

## WHAT IS MEAN BY VELOCITY?

**amanansuresh**22nd April 2015, 8:11 PM

### CBSE - IX - Physics - Motion

## on tuesday,rasheed rode to school from his home at an average speed of 12km/h and arrived 5 min late.on wednesday,rasheed rode to school from his home at an average speed of 18km/h and arrived 10 min earlier.how far does rasheed live from school. give explaination in answer.

**dev**19th November 2014, 8:37 AM

### CBSE - IX - Physics - Motion

## Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively.
Their speeds are such that each makes a complete circle in the same length of time t.Find the ratio of angular speed of the first car to that of the second car is.

**arpita**28th September 2014, 9:15 AM

### CBSE - IX - Physics - Motion

## Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively.
Their speeds are such that each makes a complete circle in the same length of time t.Find the ratio of angular speed of the first car to that of the second car is.

**arpita**28th September 2014, 9:15 AM

### CBSE - IX - Physics - Motion

**What do you mean by angular velocity ?**

**What do you mean by angular velocity ?**

**vivanyagniksetia**11th September 2014, 1:08 PM

### CBSE - IX - Physics - Motion

## what is velocity and what is magnitude ?

**soni.nadia80**27th August 2014, 5:28 PM

### CBSE - IX - Physics - Motion

## a boy on a78.4m high cliff drops a stone.one second later he throws another stone downwards with some speed.the two stones reach the ground simultuneously find the speed with which the secondstone was thrown

**Vaishnavi Sharma**22nd August 2014, 7:59 PM

### CBSE - IX - Physics - Motion

## Write one main difference between speed and velocity.

**Topperlearning User**23rd July 2014, 7:22 AM

### CBSE - IX - Physics - Motion

## Under what condition(s) is the magnitude of average velocity of an object equal to its average speed.

**Topperlearning User**23rd July 2014, 7:20 AM

### CBSE - IX - Physics - Motion

## <div>A bus moving along a straight line at <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=f7a6e84d80d8c417e029ff01e9ba5830.png" alt="20 m s to the power of minus 1 end exponent" align="middle" /> undergoes an accelaration of <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=ff200c670ba2ed8ea98b102b272b071a.png" alt="4 m s to the power of minus 2 end exponent" align="middle" />.What will be its speed after 2 seconds? </div>

**deeptisingh25**29th June 2014, 3:36 PM

### CBSE - IX - Physics - Motion

## A satellite is moving in circular orbit of radius 42250 km. Calculate its speed if it takes 24 hour to revolve around the earth.

**Ayan**26th June 2014, 8:06 PM

### CBSE - IX - Physics - Motion

## SIR,PLEASE ANSWER MY QUESTION
JOSEPH JOGS FROM ONE END A TO THE OTHER AND B OF A STRAIGHT 300M ROAD IN 2 MINUTES 50 SECONDS AND THEN AROUND AND JOGS 100M BACK TO POINT C IN ANOTHER I MINUTE. WHAT IS JOSEPH'S AVERAGE SPEED AND VELOCITY IN JOGGING
( i) from Ato B
(ii) from A to C

**cmkganesh**22nd June 2014, 7:54 PM

### CBSE - IX - Physics - Motion

## On a 1473625.736743 km track a train travels the first 4368.36466 km with speed of 27374.163747 km per 12.34 min. calculate the speed for the rest of the track to make average speed 273747.26454 km per sec.

**jeel katira**21st June 2014, 9:48 PM

### CBSE - IX - Physics - Motion

## What is the velocity of the object for which displacement is directly proportional to time?

**abhinavkumar281**2nd June 2014, 10:04 AM

### CBSE - IX - Physics - Motion

## A train travels at a speed of 60Km.hr for 0.52h , at 30 Km/r for the next 0.24h and then at 70km.h for the next 0.71hour. what is the average speed of the train

**chaitra k k**23rd May 2014, 10:35 PM

### CBSE - IX - Physics - Motion

## the minute hand of a clock is 7 cm. long . calculate the distance covered and the displacement of minute hand of the clock from 9.00 am to 9.30am

**chaitra k k**23rd May 2014, 10:33 PM

### CBSE - IX - Physics - Motion

1. A car is travelling along the road at 8 m/s .It accelerates at 1m/s2 for a distance of 18m. How fast is it travelling?

2.The distance between mumbai to delhi is 1384. A train starts from Mumbai at 4pm and reaches delhi at 10 am the next day.What is its average speed?

3.State the 3 equations of motion. Which equation describes velocity-time relation and position -time relation?

4. A cheetah starts from rest and accelerates at 2 m/s2 for 10 seconds. Calculate the final velocity and the distance travelled?

**Vaibhav BR**16th May 2014, 11:55 AM

### CBSE - IX - Physics - Motion

## What is the quantity which is measured by the area occupied below the velocity-time graph?

**Topperlearning User**13th May 2014, 12:56 PM

### CBSE - IX - Physics - Motion

## What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?

**Topperlearning User**13th May 2014, 12:54 PM

### CBSE - IX - Physics - Motion

## On a 120 km track, a train travels the first 30 km at a uniform speed of 30 km/h. Calculate the speed with which the train should move on the rest of the track so as to get the average speed of 60 km/h for the entire trip.

**Topperlearning User**13th May 2014, 12:44 PM

### CBSE - IX - Physics - Motion

## Speed is a scalar quantity whereas velocity is a vector quantity. Thus, state one difference between the two quantities important for distinguishing between speed-time graphs and velocity-time graphs.

**Topperlearning User**13th May 2014, 12:05 PM

### CBSE - IX - Physics - Motion

## A runner runs 1.0 km south, then 2.0 km east, then 1.0 km north, and then 2.0 km west to return to its starting point. This trip takes 50 minutes. What was the runner's average speed, and what was the runner's average velocity?

**Topperlearning User**8th April 2014, 8:30 AM

### CBSE - IX - Physics - Motion

## Convert 1 km/h to m/s.

**Topperlearning User**8th April 2014, 8:21 AM

### CBSE - IX - Physics - Motion

## Define the following terms: (a) speed (b) velocity (c) uniform velocity (d) non uniform velocity

**Topperlearning User**8th April 2014, 8:20 AM

### CBSE - IX - Physics - Motion

## what are the differences between speed and velocity.

**Topperlearning User**8th April 2014, 8:16 AM

### CBSE - IX - Physics - Motion

## What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?

**Topperlearning User**8th April 2014, 7:52 AM

### CBSE - IX - Physics - Motion

## What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

**Topperlearning User**8th April 2014, 7:50 AM