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

Draw velocity – time graph for the following situation:

When a body is moving with variable velocity and variable acceleration.

A solid weighs 105 kgf in air. When completely immersed in water, it displaces 30,000 cm³ of water, calculate relative density of solid.

A racing car is moving with a velocity of 50 m/s. On
applying brakes, it is uniformly retarded and comes to rest in 20 seconds. Calculate its acceleration.

From the diagram given below, calculate acceleration.

From the diagram given below, calculate deceleration.

From the velocity – time graph given below, calculate deceleration in region BC.

Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car P.

Diagram is given below shows velocity – time graph of car P and Q, starting from the same place and in the same direction. Calculate the Acceleration of car Q between 2 s – 5 s.

A motorbike, initially at rest, picks up a velocity of 72 kmh⁻¹ over a distance of 40 m. Calculate

1. acceleration
2. time in which it picks up above velocity.

A cyclist driving at 5 ms^−1, picks a velocity of 10 ms⁻¹, over a distance of 50 m. Calculate

1. acceleration
2. time in which the cyclist picks up above velocity.

An aeroplane lands at 216 kmh⁻¹ and stops after covering a runway of 2 m. Calculate the acceleration and the time, in which it comes to rest.

A truck running at 90 kmh⁻¹, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.

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 ________