Gravitation Test

Result

Gravitation Test - 2

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Question 1
1 / -0

If a small part separates from an orbiting satellite, the part will

A
fall on the earth directly

B
move in a spiral and reach the earth after a few rotations

C
continue to move in the same orbit as the satellite

D
move farther away from the earth gradually

Solution

The small part will continue to move in the same orbit after separating from its satellite because of the orbital velocity. The part achieves balance between gravity's pull on it and the inertia of motion resulting in its sustained motion.
Question 2
1 / -0

The radius of a planet's orbit increases by a factor of three. Correspondingly, time period becomes

A
two times

B
four times

C
eight times

D
sixty-four times

Solution

T² is directly proportional to R³.
The radius of a planet's orbit increases by a factor of three.
So, T²= K(4R)³
If K = 1, then
T = 8R^3/2
Question 3
1 / -0

The ratio of the inertial to gravitational mass is equal to

A
½

B
2

C
1

D
no fixed number

Solution

The ratio of the interval and gravitational mass is equal to one. The equivalence of inertial and gravitational masses is also referred to as `Galilean Equivalence Principle`.
Question 4
1 / -0

Which of the following statements is correct?

A
The mass of a body can be changed without changing its weight.

B
The weight of a body can be changed without changing its mass.

C
The weight of a body cannot be changed without changing the mass.

D
One cannot be changed without changing the other.

Solution

The weight of the body is taken to be the force on the body due to gravity whereas, mass is the measure of inertia or a fundamental measure of the amount of matter in the body.

Therefore, the weight of a body can be changed without changing its mass.