Questions :

1. In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?
(a) If the car is moving on a straight road.
(b) If the car is moving in circular path.
(c) The pendulum is moving to and fro.
(d) The earth is revolving around the sun.

2.  A particle is moving in a circular path of radius r, the displacement after half a circle would be:
(a) zero
(b) πr
(c) 2r
(d) 2πr

3. Slope of velocity-time graph gives
(a) the distance
(b) the displacement
(c) the acceleration
(d) the speed

4. A body is thrown vertically upward with velocity u, the greatest height ‘h’ to which it will rise is

(a) u/g

(b) u2/2g

(c) u2/g

(d) u/2g

5. If the displacement of an object is proportional to square of time, then the object moves with
(a) uniform velocity
(b) uniform acceleration
(c) increasing acceleration
(d) decreasing acceleration

6. From the v-t graph, it can be inferred that the object is (a) in uniform motion
(b) at rest
(c) in non-uniform motion
(d) moving with uniform acceleration

7.  Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed by 10 ms-1. It implies that the boy is
(a) at rest
(b) moving with no acceleration
(c) in accelerated motion
(d) moving with uniform velocity

8. A Circular motion is accelerated?
(a) Always
(b) When speed varies continue sly
(c) When circular motion stops
(d) When speed remains constant

9. 39. If the velocity-time graph of a particle is a curve (not straight line) then its acceleration is
(a) variable
(b) constant
(c) zero
(d) negative

10. Magnitude of displacement is equal to the distance covered by an object that means the particle is in
(a) circular motion
(b) zig-zag motion
(c) straight line path
(d) parabolic path

11. 41. An object travels 16 m in 4s and then another 16 m in 2s. Its average speed is
(a) 6 ms-1
(b) 5 ms-1
(c) 8 ms-1
(d) 5.33 ms-1

12.  The odometer of a car reads 2000 km at the start of a trip and 2400 km at the end of a trip. If the time taken is 10 h the average speed is
(a) 40 ms-1
(b) 40 kmh-1
(c) 50 kmh-1
(d) 13.9 ms-1

13. The distance covered by a Car when he starts running with acceleration of 0.5ms-2) till he achieve speed of 10m/s.
(a) 200m
(b) 120m
(c) 150m
(d) 100m

14. The distance covered by a Car when he starts running with acceleration of 0.5 ms-2 till he achieve speed of 10m/s.

(a) 200m
(b) 120m
(c) 150m
(d) 100m

## Chapter 8 Motion Quiz 3| Class 9th

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