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

A racing car, initially at rest, picks up a velocity of 180 kmh⁻¹ in 4.5 s. Calculate

1. acceleration
2. distance covered by the car.

A motor bike running at 5 ms⁻¹, picks up a velocity of 30 ms⁻¹ in 5s. Calculate

1. acceleration
2. distance covered during acceleration.

A motor bike running at 90 kmh⁻¹ is slowed down to 18 kmh⁻¹ in 2.5 s. Calculate

1. acceleration
2. distance covered during slow down.

A cyclist driving at 36 kmh⁻¹ stops his motion in 2 s, by the application of brakes. Calculate

1. retardation
2. distance covered during the application of brakes.

Explain the following:

Why a thick glass tumbler is likely to crack when hot water is poured in it?

Complete the following sentence:

The density of water is______. At 4°C.

Complete the following sentence:

Water pipes burst in winter in very cold countries is due to ________

Define acceleration.

What is the SI unit of acceleration?

The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.

What does a positive acceleration mean?

A body falls towards the earth. Does it have positive or negative acceleration?

The acceleration of a body is 8.5 ms^-2. What does this statement mean?

Write the SI unit of retardation.

A car traveling at 60 km/h, stops on applying brakes in 10 seconds. What is its acceleration?

Write the SI unit of acceleration and retardation.

Distinguish between uniformly and non-uniformly accelerated motions.

Can you use the relation [B₁]?