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

Where will a person weigh more: at Simla or at Delhi?

Name the instrument used to measure the weight of a body.

Explain why:
A moon rocket needs to reach a certain velocity.

In the below figure, a block of weight 20 N is hanging from a rigid support by a string. Find:
The force exerted by block on the string.

In the below figure, a block of weight 20 N is hanging from a rigid support by a string. Find:
The force exerted by string on the block.

What is the relationship between force and acceleration?

A force acts for 0.1 s on a body of mass 2.0 kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2 ms^-1. Find the average force applied by the player

A cricket ball of mass 500 g moving at a speed of 30 ms 1 is brought to rest by a player in 0.03 s. Find the average force applied by the player.

A body weighs 300 gf in air and 280 gf when completely immersed in water. Calculate:
(i) The loss in weight of the body,
(ii) The upthrust on the body.

Write the SI units of Density

Write the SI units of Weight of a body

Write the SI units of Relative density

An iron nail sinks in the water while an iron ship floats on water. Explain the reason.
What can you say about the average density of a ship floating on water?

If 2/3rds of a piece of wood submerges in water and 3/4ths of the same piece of wood submerges in oil. Find the density of the oil.

A wooden cube of side 10 cm has a mass of 700 g. It will float in the water with:
(a) Half of its volume inside the water
(b) 3 cm height above the water surface
(c) 7 cm height above the water surface
(d) Just inside the water surface.