EASY
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What is spring balance used for?

Important Questions on Physical Environment-Force and Pressure

HARD

The mass of a plant is twice and its radius is three times that of the earth. The weight of a body, which has a mass of 5 kg, on that planet will be

EASY
The weight of a body is 9.8 N, when g=9.8 m s-2 the mass of the body is
MEDIUM
A man carrying a load of weight W on his hand jumps from a height. During free fall, the weight of load experienced by man is
EASY

A mass of 1 kg is tied to a string as shown in the figure.

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Find the force exerted on the mass by the Earth (g=9.8 m s-2).

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A person weighs W on the surface of the earth. The weight of the person at the centre of the earth will be:
MEDIUM
The weight of an object at the centre of the earth of radius R is
EASY
The weight of a body is 49 N. What is its mass?
MEDIUM
If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?
MEDIUM
The mass of a body is 50 kg on the surface of the earth. Find its weight on the surface of the planet whose mass is double than the mass of the earth and radius is five times the radius of the earth.
EASY
There are two kinds of balances-beam balance and spring balance. If both the balances give the same measure of a given object on the surface of the earth, will they give the same measure on the surface of the moon? Explain why.
EASY
Suppose the gravitational attraction of earth suddenly disappear, then 
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If the mass of a body is 5 kg, what is its weight?
MEDIUM
A body has a weight W on the surface of earth. What is its weight on a planet which has mass 10 times that of the earth and a radius of 4 times that of the earth?
EASY
Mass of an object is 7 kg. What is its weight?
EASY
If the mass of a body is 5 kg, what is its weight?
MEDIUM
A body weighs 20 kg on the earth's surface. What is its weight at the centre of the earth.