CBSE - Motion

1 Motion Velocity-time graph AB (Figure) shows that the body has-

(1)  A uniform acceleration
(2)  A non uniform retardation
(3)  Uniform speed
(4)  Initial velocity OA and is moving with uniform retardation

2 Motion  A car travels (1 / 4) ^th of a circle with radius r.  The ratio of the distance to its displacement is-

3 Motion If car A is at 80 km/h and car B is at 60 km/h in the same direction, what is the velocity of thecar A relative to the car B?
(1) 40 km/h
(2) 20 km/h
(3) 10 km/h
(4) 30 km/h

4 Motion A body is dropped from certain height from a uniformly ascending balloon. The correct graph showing variation of velocity with time for body is :

5 Motion A body of mass 2 kg is free to move along x-axis. It is at rest at t = 0. From t = 0 onwards it is subjected to a time dependent force F(t ) in x-direction. The variation of F with time is as shown :



The change in momentum during journey is (in N-s) :
(1) 4.50
(2) 7.50
(3) 5.06
(4) 14.06

6 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.

7 Motion To describe the motion of an object we first specify a
 (1) The acceleration of the body
 (2) Reference point
 (3) The speed
 (4) The direction of motion

8 Motion Two bodies in circular paths of radii 1 : 2 take same time to complete their circles. The ratio of their linear speeds is-

(1)  1 : 2
(2)  2 : 1
(3)  1: 3
(4)  3 : 1

9 Motion The distance travelled by the body between 0 to 20 seconds?

(1) 260m
(2) 160m
(3) 300m
(4) 60m

10 Motion How many meters is equal to 1 nanometer?
(1) 10^–9 meter
(2) 10^–10 meter
(3) 10 ⁹ meter
(4) 10¹⁰ meter