CBSE - Motion

1 Motion A body starts from rest at time t = 0, the acceleration time graph is shown in figure. The maximum velocity attained by the body will be :

(1) 110 m/s
(2) 55 m/s
(3) 650 m/s
(4) 550 m/s

2 Motion What is the slope of distance-time graph when object is at rest?
(1) Decreases continuously
(2) Zero
(3) Increases continuously
(4) One

3 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

4 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

5 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

6 Motion In 12 minutes a car whose speed is 35 kmh^–1 travels a distance of -

(1)  7 km
(2)  3.5 km
(3)  14 km
(4)  28 km

7 Motion A quantity has a value of -16 m/s² . It is be the :
(1) Acceleration of an object.
(2) Retardation of an object.
(3) Velocity of an object.
(4) Speed of an object.

8 Motion At the top of its path a projectile has
(1) no acceleration
(2) acceleration in the upward direction
(3) acceleration in the downward direction
(4) acceleration in the horizontal direction

9 Motion Without actually calculating the speed, can you guess in which time interval is the body moving fastest?

(1) 20-40 s
(2) 40-50 s
(3) 90-100 s
(4) 80-90 s

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