Newton's Law of Gravitation — Practice Quiz

Question 1

Force of gravity between Earth (5.97 × 10²⁴ kg) and Moon (7.35 × 10²² kg) at distance 3.84 × 10⁸ m:

Accepted Answer

1.98 × 10²⁰ N

Answer

1.98 × 10¹⁵ N

Answer

9.8 × 10¹⁴ N

Answer

1.98 × 10¹⁸ N

Question 2

If the distance between two bodies is halved, gravitational force becomes:

Accepted Answer

4×

Answer

½

Answer

2×

Answer

8×

Question 3

Cavendish's experiment measured:

Accepted Answer

G

Answer

g

Answer

Earth's mass

Answer

Solar mass

Question 4

Inside a uniform spherical shell, gravity is:

Accepted Answer

Zero

Answer

Maximum at center

Answer

Equal everywhere

Answer

Inversely as r

Question 5

Newton's law of gravitation is:

Accepted Answer

Inverse-square attractive

Answer

Repulsive at large r

Answer

Inverse-cube

Answer

Linear