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

Following Fig shows piece of cardboard of uniform thickness cut into different shapes. Draw two lines to indicate the position of centre of gravity G.

Fig. shows the dimensions of an acute angled triangle. By geometrical construction mark the C.G. of the triangle.

A right-angled triangle cardboard piece is placed as shown in fig. 7. Redraw the diagram showing the relative position of the vertices of the triangle when it is suspended by a pin from the hole A. Explain why the position changes?

Give scientific reason for the following:
It is easier to push a boy standing on one leg than on both legs.

Give scientific reason for the following:

There are chances of toppling when a truck takes a sharp turn   especially when it is not fully loaded

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.