Chapter –Motion
1 – Mark Questions
1. An object A is moving with a constant velocity for 5 minutes. Another object B is moving with
changing velocity for 5 minutes. Out of these two objects, which one has acceleration?
2. When does the velocity and speed of a moving body become identical?
3. What is meant by body in motion?
4. Can an object be accelerated if it is moving with constant speed? If yes, give example.
5. Can a body have constant acceleration but zero velocity? If yes, give example.
6. Name the physical quantity that corresponds to the rate of change of velocity.
7. Give one example of retardation.
8. What can you say about the motion of a body if its velocity – time graph is a straight line parallel to time
axis?
9. Name the physical quantity measured by the area under speed-time graph.
10. Name the physical quantity measured by the slope of the velocity-time graph for uniform motion.
11. A physical quantity measured is -10ms-1. Is it a speed or velocity?
12. A moving train is brought to rest within 20 sec by applying brakes. Find the initial velocity, if the
retardation due to brakes is 2 m/s2.
13. A satellite revolves around the earth with uniform speed. Is the motion of the satellite uniform or
accelerated?
14. Differentiate between scalar and vector quantities.
15. Why is uniform linear motion not an accelerated motion?
2 – Mark Questions
1. Differentiate between speed and velocity.
2. A bus covers a distance of 250 km from Delhi to Jaipur towards West in 5 hours in the morning and
returns to Delhi in the evening covering the same distance of 250km in the same time of 5 hours. Find
(a) average speed & (b) average velocity of the bus for the whole journey.
3. Ashok travels on a straight road. He goes from position A to position B. The distance between A and B
is 4 km. Now from position B he turns back and travels a distance of 2 km to reach the position C. Find
(i) the total distance travelled by Ashok during whole journey and (ii) magnitude of his displacement.
4. A racing car has a uniform acceleration of 4 ms-2. What distance will it cover in 10 seconds after the
start?
5. Write characteristics of distance – time graph.
6. Write characteristics of velocity – time graph.
7. A scooter moving at a speed of 10m/s is stopped by applying brakes which produce a uniform
acceleration of – 0.5 ms-2. How much distance will be covered by the scooter before it stops?
8. A man keeps 12 steps in Northern direction and turns left to keep 5 steps. He then returns to the initial
point by the shortest path. Find (i) the distance travelled and (ii) displacement. Given each step is 0.3 m.
9. A train starting from rest attains a velocity of 20 m/s in 2 minutes. Assuming that the acceleration is
uniform, find (i) the acceleration (ii) distance travelled by the train, while it attained this velocity.
10. What is meant by uniform circular motion? Why do we need a force to keep a body moving uniformly
along a circular path? Name this force.
3 – Mark Questions
1. A scooterist travels at a speed of 5m/s for 2 min, at 12.5 m/s for 10 min and then with 10 m/s for 5 min.
What is the average velocity and distance covered?
2. A car starting from rest and moving on a straight road with 2m/s2 acceleration is observed for 10 s. Find:
(i) the distance travelled in this time and (ii) the velocity at the end of this time.
5 – Mark Questions
1. Derive the three basic equations of motion for a body moving in a straight line with constant
acceleration.