Variation of g with Height

Q. What is meant by acceleration due to gravity? Explain the variation in its value when an object moves from poles to the equator of Earth. what effect will this variation have on the weight of a mass of 300kg on poles at equator?

Q. The weight of the body in the polar region of the earth is slightly greater than the other regions of the earth.

1. True
2. False

Q.

If the acceleration due to gravity on Mars is more than that of Earth, then the weight of an object on Mars will be

1. decrease

2. Remain same

3. none of these

4. increase

Q. The weight of an object in a satellite orbiting the earth is
A- Equal to its weight on earh' surface
B- Somewhat less than it.s weight on earth, s surface
C-More than it, s weight on earth, s surface
D-Zero

Q.

If 'R' is the radius of earth, the height from the surface at which the weight of a body becomes one-fourth of its weight, on the surface of earth is:

1. 2R

2. R

3. R/4

4. R/2

Q. If we take an apple to a hill top, its weight will _______.

1. not change
2. decrease
3. first decrease then increase
4. increase

Q. A man weighs $600N$ on the equator, but when he moves to pole he finds a slight increase in his weight. This is because:

1. Radius of the Earth is less at poles.
2. Mass of earth is less concentrated near poles.
3. Radius of the Earth is more at poles.
4. The magnetic field is higher at poles than that at the equator.

Q.

A point object is one whose size is ________ as compared to the distance it moves.

Q. A body weighs 72 N on the surface of the Earth. What will be the force of gravity acting on the body at a height equal to half the radius of the Earth above the Earth's surface?

1. 32 N
2. 20 N
3. 10 N
4. 0 N

Q. A spring balance is graduated on sea level. If a body is weighed with this balance at consecutively increasing heights from earth's surface, the weight indicated by the balance:

1. Will first increase and then decrease
2. Will go on decreasing continuously
3. Will remain same
4. Will go on increasing continuously

Q.

Use the following information to answer the next question.

A traveller moves from the equator to one of the poles of earth. The weight of the travellercontinuously, whereas his massThe information in which alternative completes the given statement?

The information in which alternative completes the given statement?

1. 

2. 

3. 

4. 

Q.

a substance weights 100 kg . if acceleration due to gravity is 9.8ms-2 , then mass of the given substance will be?

Q. Acceleration of a body projected upwards with a certain velocity is:

1. $9.8m/s^2$
2. zero
3. $-9.8m/s^2$
4. $\frac{9.8}{6}m/s^2$

Q. Mass and Weight are two different things. If a persons weight is 60kgon Earth does that mean his mass is around 6kg? And if his mass is 6kg on Earth does that means his weight is about 60kg?

Q. Acceleration due to gravity at poles is ___ than/as that at equator.

1. lesser
2. greater
3. half
4. same

Q.

Calculate acceleration due to gravity at a height of $2000km$ above the Earth's surface. Mass of Earth = $6\times {10}^{24}kg$, radius of Earth = $6.4\times {10}^6$ m and (Gravitational constant, G $=6.7\times {10}^{-11}N{m}^{2}k{g}^{-2}$)

1. $4.7m{s}^{-2}$

2. $5.7m{s}^{-2}$

3. $6.7m{s}^{-2}$

4. $3.7m{s}^{-2}$

Q.

The atmosphere is held to the Earth due to:

1. Gravitational force of Earth

2. Gravitational force of Moon

3. Gravitational force of Sun

4. Rotation of Earth

Q. If a body of mass m is taken to the bottom of a deep mine, then its ___.

1. mass increases
2. mass decreases
3. weight increases
4. weight decreases