CBSE - Motion

1 Motion In which of the following graphs are both runners moving at the same speed?

(1) Graph-C
(2) Graph-A
(3) Graph-D
(4) Graph-B

2 Motion 

The acce le ration of the above velocity-time graph is:
(1) Non-uniform.
(2) Zero.
(3) One.
(4) Uniform.

3 Motion 

In a circular path of radius 1 m, a mass of  2 kg moves with a constant speed of 10 ms^–1 .The angular speed in radian/sec. is -
(1) 5
(2) 10
(3) 15
(4) 20

4 Motion A man is moving with 36 kmph. The time of reaction is 0.9 seconds. On seeing an obstacle in the path, he applies brakes and decelerates at 5 m/s², the total distance covered before he
stops is:
(1) 19 m
(2) 17 m
(3) 16 m
(4) 18 m

5 Motion If car A is at 40 km/h and car B is at 10 km/h in the opposite direction, what is the velocity of the car A relative to the car B?
(1) 20 km/h
(2) 50 km/h
(3) 10 km/h
(4) 40 km/h

6 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

7 Motion A thin uniform metal rod of mass ' m' and length ‘ l’ standing vertically is now allowed to fall due to its own weight.

The velocity with which its mid-point will strike ground will be :

8 Motion The initial velocity of the free falling object is _____________?
(1) More
(2) Less
(3) Zero
(4) 9.8 m/s

9 Motion Rest and motion are _____________ terms.

(1) non-relative
(2) same
(3) relative
(4) all the above

10 Motion 40 A body starts falling from height 'h' and travels distance h/2 during the last second of motion. The time of travel (in sec.) is-
(1) √ 2 -1
(2) 2 + √2
(3) √2+ √3
(4) √3 +2