10 Questions
| Attempts: 102

Questions and Answers

- 1.A balloon starts rising from rest from the ground with an acceleration of 1.25 m/s
^{2}. After 8s, a stone is released from the balloon. The stone will :- A.
Cover a distance of 40 m

- B.
Have a displacement of 50 m

- C.
Reach the ground in 4s

- D.
Begin to move down after being released

- 2.The figure shows, the displacement-time graph of a particle moving on the X-axis.
- A.
The particle is continuously going in positive x direction

- B.
The particle is at rest

- C.
The velocity increases up to a time , and then becomes constant

- D.
The particle moves at a constant velocity up to a time , and then stops

- 3.A person standing near the edge of the top of building throws two balls A and B. The ball A is thrown vertically downward with the same speed. The ball A hits the ground with a speed and the ball b hits the ground with a speed. We have
- A.
VA>VB

- B.
VA

- C.
VA=VB

- D.
The relation between VA and VB depends upon the height of the building

- 4.The displace of a particle moving in a straight line is given by . Here s is in m and t is in seconds. The distance covered by the particle is first 5 seconds is :
- A.
10 m

- B.
26 m

- C.
24 m

- D.
16 m

- 5.A stone is released from a elevator going up with an acceleration a. The acceleration of the stone after the released is :
- A.
A upward

- B.
(g - a) upward

- C.
(g - a) upward

- D.
g downward

- 6.6 particles A, B, C, D, E, F are located at the vertices of a regular hexagon of side d. All particles move with the same speed
*v*such that the velocity of A is directed towards B, that of B towards C and so on (F is direction towards A). After what time will the particle meet ?- A.
2d/v

- B.
3d/v

- C.
2d/3v

- D.
D/v

- 7.Acceleration-velocity graph of a particle moving in a straight line is as shown in the figure. The slope of velocity-displacement graph is
- A.
Increases linearly

- B.
Decreases linearly

- C.
is constant

- D.
increases parabolically

- 8.Particle A and B move as shown in figure. The minimum separation between A and B is :
- A.
10 m

- B.
7.92 m

- C.
0 m

- D.
8 m

- 9.An object may have
- A.
Varying speed without having varying velocity

- B.
Varying velocity without having varying speed

- C.
Nonzero acceleration without having varying velocity

- D.
Nonzero acceleration without varying speed

- 10.Mark the correct statements :
- A.
The magnitude of the velocity of a particle is equal to its speed

- B.
The magnitude of average velocity in an interval is equal to its average speed in that interval

- C.
It is possible to have a situation in which the speed of a particle is never zero but the average speed is not zero

- D.
It is possible to have a situation in which the speed of the particle is never zero but the average speed is interval is zero

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