Question Bank

What is the effect of force on a rigid body?

Pressure in a liquid at the same horizontal level is:

An iron nail sinks in water but an iron ship floats because:

If the Earth's radius decreases by 1% while mass remains same, the value of 'g' will:

A body of mass 100g is moving with a velocity of 5m/s. Its momentum is:

The gravitational force between two bodies is F. If the mass of one body is doubled and distance is halved, the new force is:

At what depth from the surface of Earth does the value of 'g' become half of its surface value? (R is Earth radius)

A piece of wood floats in water with 1/4th of its volume above the surface. The density of wood is:

If the escape velocity on Earth is 11.2 km/s, what would it be on a planet with double the mass and double the radius of Earth?

A body is thrown vertically upwards. At the highest point:

Two bodies of masses 1 kg and 5 kg are dropped from the same height in vacuum. Which reaches the ground first?

A hydraulic machine has a velocity ratio of 5. If an effort of 100 N is applied to lift a load of 450 N, what is the efficiency?

The weight of a body at the pole is Wp and at the equator is We. Which is correct?

What is the percentage change in 'g' if the radius of Earth shrinks by 2% (mass constant)?

If a body of mass 'm' is taken to a height 'h' equal to the radius of Earth 'R', the value of 'g' becomes:

A metal cube of side 10 cm and density 8000 kg/m³ is suspended in water. The upthrust is:

Atmospheric pressure is 760 mm of Hg. What is this in Pascals? (Density of Hg = 13600 kg/m³, g = 9.8)

In a lift moving upwards with an acceleration 'a', the effective weight of a person is:

If the distance between two masses is reduced to one-third, the gravitational force becomes:

Which of the following follows the law of floatation?