Questions :

1.Find the average speed of a bicycle if it completes two round of a circular track of radius 140m twice in 5min 52 sec.

(a) 10m/s

(b) 5m/s

(c) 2m/s

(d) 4m/s

2. If ‘s’ is displacement and ‘d’ is distance between two points, then the correct relation is

(a) s = d
(b) s > d
(c) d > s
(d) none

3. Which of the following figures represents uniform motion of a moving object correctly?    4. A physical quantity which cannot be negative is
(a) displacement
(b) velocity
(c) acceleration
(d) distance

5.  A person moves from point  O in a straight line to a point X 50m, and return from X to point Y in direction XO 20m. What is displacement made?20. A person moves from point  O in a straight line to a point X 50m, and return from X to point Y in direction XO 20m. What is displacement made?

(a) 50m

(b) 80m

(c) 20m

(d) 30m

6. When a body covers unequal distances in equal intervals of time, it is said to be in
(a) linear motion
(b) uniform motion
(c) non-uniform motion
(d) vibratory motion

7.  A particle travels with a speed of 18 km/hr, its speed in m/s is
(a) 5 m/s
(b) 50 m/s
(c) 64.8 m/s
(d) 6.48 m/s

8. Which of the following is vector quantity?Which of the following is vector quantity?

(a) Distance

b) Displacement

(c) Velocity

(d) Both (b) and (c)

9.  A bus moves from stop ‘A to stop ‘B’ with a speed of 40 km/hr and then from stop ‘B’ to stop ‘A with a speed of 50 km/hr. Its average speed is
(a) 48.5 km/hr
(b) 44 km/hr
(c) 45 km/hr
(d) 44.4 km/hr

10. Area under velocity-time gives
(a) displacement
(b) acceleration
(c) velocity
(d) time

11. Displacement-time graph of a uniformly accelerated motion is
(a) parabola
(b) straight line
(c) an inclined line
(d) none

12. A car with speed 72km/hr suddenly applies break. The break has maximum ability to decelerate with 5ms^(-2). Find time taken to stop the car after applying breaks?A car with speed 72km/hr suddenly applies break. The break has maximum ability to decelerate with 5ms^(-2). Find time taken to stop the car after applying breaks?

(a) 2sec

(b) 3sec

(c) 4sec

(d) 5sec

13. 28. A particle travels 100 metres after starting from rest in 10 seconds. Its acceleration is
(a) 2 m/s2
(b) 4 m/s2
(c) 1 m/s2
(d) 20 m/s2

14. In uniform circular motion, velocity of particle is
(a) constant
(b) variable in magnitude
(c) variable in direction
(d) both (a) and (b)

15. 30. Velocity of a particle increases from 10 m/s to 15 m/s after travelling a distance of 5 metre. Its acceleration is
(a) 12.5 m/s2
(b) 125 m/s2
(c) 1.25 m/s2
(d) 0.125 m/s2

## Chapter 8 Motion Quiz 2| Class 9th

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