(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Even though the Tower of Pisa is leaning through an angle it does not fall.

Give scientific reason for the following:

In a doubled decker bus passengers are not allowed to stand in the upper deck.

The centre of gravity of a hollow cone of height h is at distance x from its vertex where the value of x is ______.

How much energy is gained by a box of mass 20 kg when a man, raises the box by 0.5 m in order to place it inside the bus? (g=10 m/s^-2)

A radioactive source emits three types of radiations.

Name the radiation which has the lowest penetrating power.

Which one α, β and γ has the least penetrating power?

The least penetrating radiation is ______.

Where does the position of centre of gravity lie for a circular lamina?

What is Gravitational force? Give gravitational units of force.

Can the CG be situated outside the material of the body? Give an example.

Explain why One leans forward while climbing up a hill.

Explain why a tight rope-walker, often holds a long pole in his hands when in action.

Explain why a ship loaded with light goods is more liable to be overturned than the one loaded with heavy goods.

Explain why Standing passengers are not allowed on the upper deck of a double-decker bus.

Explain the term ‘centre of gravity’ of a body.

State two methods of increasing the stability of the body.

A boy of mass 40 kg runs up a height of 30 steps, each 20 cm high. Find:
(i) The force of gravity acting on the boy.
(ii) The work done by the boy against gravity. (Take g = 9.8 ms⁻²)