(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

What can you say about the nature of motion of a body if its displacement-time graph is A straight line parallel to the time axis?

What can you say about the nature of motion of a body if its displacement-time graph is A straight line inclined to the time axis with an acute angle?

What can you say about the nature of motion of a body if its displacement-time graph is A straight line inclined to the time axis with an obtuse angle?

What can you say about the nature of motion of a body if its displacement-time graph is A curve.

Figure shows the displacement-time graph of two vehicles A and B moving along a straight road. Which vehicle is moving faster? Give reason.

Draw a velocity-time graph for a body moving with an initial velocity u and uniform acceleration a. Use this graph to find the distance travelled by the body in time t.

How is the distance related with time for motion under uniform acceleration such as the motion of a freely falling body?

The following table gives the displacement of a car at different instants of time.  

1. Draw the displacement-time sketch and find the average velocity of the car.
2. What will be the displacement of the car at (i) 2.5 s and (ii) 4.5 s?

A body is moving in a straight line and its displacement at various instants of time is given in the following table 

Plot the displacement-time graph and calculate

(i) Total distance travelled in the interval 1 s to 5 s.

(ii) Average velocity in time interval 1 s to 5 s.

From the displacement-time graph of a cyclist given below in the Figure, find The displacement from the initial position at the end of 10 s,

Figure ahead represents the displacement - time sketch of motion of two cars A and B . Find : 
(i) the distance by which the car B was initially ahead of car A.
(ii) the velocities of car A and car B.
(iii) the time in which car A catches car B.
(iv) the distance from start when the car A will catch the car B.

A body at rest is made to fall from the top of a tower. Its displacement at different instants is given in the following table: 

Draw a displacement-time graph and state whether the motion is uniform or non-uniform?

Figure (a) shows the velocity-time graph for the motion of a body. Use it to find the displacement of the body at t = 1 s, 2 s, 3 s and 4 s, then draw on Figure (b), the displacement-time graph for it.

(a)	(b)

Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.

Compare the distance travelled in part BC with the distance travelled in part AB.

Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.

State how is the distance travelled in any part determined from this graph .

A ball moves on a smooth floor in a straight line with uniform velocity 10 m s^-1 for 6 s. At t = 6 s, the ball hits a wall and comes back along the same line to the starting point with the same speed. Draw the velocity-time graph and use it to find the total distance travelled by the ball and its displacement.

Figure shows the velocity-time graph of a particle moving in a straight line.

(i) State the nature of motion of particle.

(ii) Find the displacement of particle at t = 6 s.

(iii) Does the particle change its direction of motion?

(iv) Compare the distance travelled by the particle from 0 to 4 s and from 4 s to 6 s.

(v) Find the acceleration from 0 to 4 s and retardation from 4 s to 6 s.

Write an expression for the distance S covered in time t by a body which is initially at rest and starts moving with a constant acceleration a.

A car starting from rest accelerates uniformly to acquire a speed 20 km h^-1 in 30 min. The distance travelled by a car in this time interval will be _____________

A body starts from rest with uniform acceleration 2 m s^-2. Find the distance covered by the body in 2 s.