Acceleration Due To Gravity

A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force:

1.	is greatest at the instant just before the body hits the earth.
2.	remains constant throughout.
3.	is greatest at the instant just after the body is projected.
4.	is greatest at the highest position of the body.

The height at which the weight of a body becomes of its weight on the surface of the earth (radius ) is:
1.
2.
3.
4.

Starting from the centre of the earth, having radius the variation of (acceleration due to gravity) is shown by:

1.		2.
3.		4.

The acceleration due to gravity at a height above the earth's surface is the same as at a depth below the surface of the earth. Then:

1.		2.
3.		4.

If the mass of the sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following statements would not be correct?

1.	Raindrops would drop faster.
2.	Walking on the ground would become more difficult.
3.	Time period of a simple pendulum on the earth would decrease.
4.	Acceleration due to gravity on earth would not change.

A body weighs N on the surface of the earth. How much will it weigh halfway down the centre of the earth?

1.	N	2.	N
3.	N	4.	N

What is the depth at which the value of acceleration due to gravity becomes times it's value at the surface of the earth? (radius of the earth = )

1.		2.
3.		4.

A planet has a mass equal to of Earth's mass and a diameter equal to half of Earth's diameter. The acceleration due to gravity on this planet is:

1.		2.
3.		4.

A body weight on the surface of the earth. The gravitational force experienced by the body due to the Earth at a height equal to one-third the radius of the Earth from its surface is:
1.
2.
3.
4.