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a. mass increases.

b. mass decreases.
c. weight increases.

d. weight decreases.

8. The acceleration due to gravity at three pointA, B and C are 9.8 m/s2 ,10m/s2 and
5 m/s2 on the earth surface?

Which of the following is true?

a. B is at least distance out of three point from the center of the earth

b. C is at farthest distance out of three point from the center of the earth

c. Weight of the object is lowest at point C out of three point

d. The weight of the object varies as WA>WB>WC

SUBJECTIVE

1. Suppose gravity of the earth suddenly becomes zero, then in which direction will the
moon begin to move if no other celestial body affects it? (Hots)

2. The weight of any person on the moon is about 1/6 times that on the earth. He can lift
a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by
the same force applied by the person on the moon? (Hots)

3. How does the weight of an object vary with respect to mass and radius of the earth?
In a hypothetical case, if the diameter of the earth becomes half of its present value and
its mass becomes four times of its present value, then how would the weight of any
object on the surface of the earth be affected? (Hots)

NUMERICALS

1. Compute the weight of a body on the moon if the mass is 60Kg? g is given as
2
1.625m/s .

2. Compute the weight of a body on earth whose mass is 25kg.
3. The weight of the man on earth is 150 N and on certain planet is 25 N.

Take g=10m/s2 on earth
a. Find the mass of the man on earth and planet

b. Find the acceleration due to gravity on the planet

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