Free Printable 7.1 - Kepler's Laws and Newton's Law of Universal Gravitation

1.

According to Kepler's first law, the paths of the planets are circular in shape.

a)

True

b)

False

2.

Which of those have highly elliptical orbits?

a)

Planets

b)

Satellites

c)

Comets

3.

Which law states that the areas at equal time intervals of a planet are equal?

a)

Kepler's first law

b)

Kepler's second law

c)

Kepler's third law

d)

Newton's law of universal gravitation

4.

Planets are faster when closer to the Sun because

a)

Distance is greater, time is greater

b)

Distance is greater, time is smaller

c)

Distance is smaller, time is smaller

d)

Distance is greater, time is the same

5.

Kepler's third law is represented by the following equation:

a)

b)

c)

d)

6.

Kepler's third law can be applied to any two bodies as long as they are orbiting around a single common body.

a)

True

b)

False

7.

Which equation represents Newton's law of universal gravitation?

a)

$F_g=\frac{Gm_1m_2}{r}$

b)

$F_g=\frac{Gm_1m_2}{r^2}$

c)

$F_g=\frac{m_1m_2}{Gr^2}$

d)

$F_g=\frac{Gm_1r^2}{m_2}$

8.

When the distance between two objects is doubled, in terms of $F_g,$ the force of gravity between them will be

a)

2F_g

b)

$4F_g$

c)

$\frac{1}{2}F_g$

d)

$\frac{1}{4}F_g$

9.

Find Mercury's period around the Sun in Earth years. Use Table 1 on page 180.

a)

0.240 years

b)

0.386 years

c)

0.621 years

10.

Find the force of gravitation between two 5.0 kg balls that are 1.5 m apart.
Use $G=6.67\times10^{-11}\ \frac{N.m^2}{kg^2}$

a)

1.5\times10^{-10}\ N

b)

$7.4\times10^{-10}\ N$

c)

$1.1\times10^{-9}\ N$

7.1 - Kepler's Laws and Newton's Law of Universal Gravitation

Total questions: 10

Worksheet time: 6mins

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