CBSE - Motion

1 Motion Which of the following is not characteristic of displacement ?

(1)  It is always positive.
(2)  It has both magnitude and direction.
(3)  It can be zero.
(4)  Its magnitude is less than or equal to the actual path length of the object.

2 Motion A body is moving along a straight line at 20 ms^–1 undergoes an acceleration of 4 ms After 2 s, its speed will be-

(1)  8 ms^–1
(2)  12 ms^–1
(3)  16 ms^–1
(4)  28 ms^–1

3 Motion The velocity time graph of runner is given in the graph. What is the total distance covered by the runner in 16s?

(1) 100 m
(2) 70 m
(3) 30 m
(4) 130 m

4 Motion The brakes applied to a car produce a negative acceleration of 6ms^–2  If the car stops after 2 seconds, the initial velocity of the car is -

(1)  6 ms^–1
(2)  12 ms^–1
(3)  24 ms^–1
(4)  Zero

5 Motion The acceleration of an object moving in a straight line can be determined from:
(1) The area between the distance-time graph and time axis.
(2) The area between the velocity-time graph and time axis
(3) The slope of the velocity-time graph.
(4) The slope of the distance-time graph.

6 Motion 

The relation among v, w  and r is -
(1) w = v / r
(2) v = w  / r
(3) w  = r / v
(4) None of these

7 Motion 

A ball is thrown vertically upwards. Which of the following plot represents the velocity time graph of the ball during its flight, if the air resistance is not ignored ?

8 Motion 

In the distance-time graph of a cyclist, what is happening between B-C and C-D?

(1) B-C: cyclist is coming back to where he started, C-D: cyclist is stationary.
(2) B-C: cyclist is stationary, C-D: cyclist is accelerating.
(3) cyclist is stationary, C-D- speed is increasing
(4) B-C: cyclist is stationary, C-D: cyclist is coming back to where he started.

9 Motion  A body freely falling from rest has a velocity v after it falls through a height h. The distance it has to fall further for its velocity to become double is -

(1)  3 h
(2)  6 h
(3)  8 h
(4)  10 h

10 Motion A body falling from rest describes distances S1, S2 and S3 is the first, second and third seconds of
its fall. Then the ratio of S1:S2:S3 is :
(1) 1 : 1 : 1
(2) 1 : 3 : 5
(3) 1 : 2 : 3
(4) 1 : 4 : 9