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

A car accelerates at a rate of 5 m s^-2. Find the increase in its velocity in 2 s.

A car is moving with a velocity 20 m s^-1. The brakes are applied to retard it at a rate of 2 m s^-2. What will be the velocity after 5 s of applying the brakes?

A car is moving in a straight line with speed 18 km h^-1. It is stopped in 5 s by applying the brakes. Find:

1. the speed of car in m s^-1
2. the retardation and
3. the speed of car after 2 s of applying the brakes.

For the motion with uniform velocity , how is the distance travelled related to the time ? 

Draw the shape of the velocity-time graph for a body moving with (a) Uniform velocity and (b) Uniform acceleration.

Figure shows the displacement of a body at different times . 

Calculate the velocity of the body as it moves for time interval :
(i) 0 to 5 s,
(ii) 5 s to 7 s 
(iii) 7 s to 9 s.

Figure shows the displacement of a body at different times . 

Calculate the average velocity during the time interval 5 s to 9 s ,
[Hint : From 5 s to 9 s , displacement = 7 m - 3m = 4m]

From the displacement-time graph of a cyclist given below in the Figure, find The average velocity in the first 4 s.

The velocity-time graph of a moving body is given below in Figure

Total displacement.

The velocity-time graph of a moving body is given below in Figure

Displacement in each part AB, BC and CD.

The velocity-time graph of a moving body is given below in Figure

The acceleration in parts AB, BC and CD.

A train travels with a speed of 60 km h^-1 from station A to station B and then comes back with a speed 80 km h^-1 from station B to station A. Find -

1. The average speed
2. The average velocity of the train.

A body moves from rest with uniform acceleration and travels 270 m in 3 s. Find the velocity of the body at 10 s after the start.

A train is moving with a velocity of 90 km h^-1 . It is brought to stop by applying the brakes which produce a retardation of 0.5 ms^-2 Find :
(i) The velocity after 10 s , and
(ii) the time taken by the train to come to rest .

What is tidal energy ?  Explain in brief.

 What is ocean energy? Explain in brief.

A body measures 25 m. State the unit and the magnitude of the unit in the statement.

Name the convenient unit you will use to measure:

length of a hall

Name the convenient unit you will use to measure:

width of a book

Name the convenient unit you will use to measure:

diameter of hair