Free Printable Planetary Motion

1.

The gravitational force is strongest when charges are (select all that apply):

a)

close together

b)

far apart

c)

have more mass

d)

have less mass

2.

Two bodies with mass will (select all that apply):

a)

combine into a larger mass

b)

attract each other

c)

create gravitational fields

d)

push each other apart

3.

An object with mass attracts another object with mass is:

a)

The Law of Universal Gravitation

b)

Coulomb's Law

c)

Newton's First Law of Motion

d)

Newton's Third Law of Motion

4.

The force of gravity is inversely proportional to:

a)

Mass

b)

Weight

c)

Distance

d)

Time

5.

If Earth's mass was cut in half, what would happen to your mass?

a)

increase because the gravitational force from Earth decreases

b)

decrease because the gravitational force from Earth decreases

c)

decrease because the gravitational force from Earth increases

d)

it would not change, my mass is not affected by gravitational force

6.

What is the Universal Law of Gravitation equation?

a)

$g\ =\ \frac{GM}{r^2}$

b)

$F_{e\ }=\ k_e\frac{\ q_1q_2}{r^2}$

c)

$F_g\ =G\ \frac{m_1m_2}{r^2}$

d)

$F_g\ =\ gm$

7.

Two objects can have both a gravitational attraction and an electrostatic repulsion.

a)

True, if the objects have the same charge and have mass

b)

True, if the objects have mass but were attracted and not repelling

c)

False, charged particles have almost no mass

d)

False, one field will cancel out the other

8.

If every thing with mass has gravity, why does my cell phone not "stick" to me from gravity?

a)

My mass is so small, the gravitational field does not extend past my body.

b)

My cell phone's mass is too small to have gravity.

c)

My cell phone is electronic and has an electrostatic field that cancels out the gravitational field.

d)

My cell phone is not magnetic.

9.

What type of force is gravity (select all that apply)?

a)

a non-contact force

b)

an repulsive force

c)

a weak force

d)

an attractive force

e)

a strong force

10.

Gravity affects which of the following (select all that apply):

a)

the orbits of planets

b)

the formation of matter just after the big bang

c)

the weight of an object on Earth

d)

the formation of stars and planets

e)

the formation of light in stars

11.

What type of force is the electrostatic force (select all that apply)?

a)

a non-contact force

b)

a contact force

c)

a repulsive force

d)

an attractive force

e)

a weak force

12.

What are the units for gravitational and electrostatic forces?

a)

Coulombs

b)

Newtons

c)

Grams

d)

Meters

13.

What is Kepler's 2nd Law about?

a)

the shape of the orbits

b)

the speed or area an orbiting object travels

c)

the size of the orbit an object has

d)

the amount of time it will take for an object to orbit

14.

When it is farther from the sun, a planet appears to move:

a)

faster

b)

slower

15.

The Earth has an eccentricity of 0.0167 as it orbits around the Sun. Which diagram is the best representation of the orbit of the Earth around the Sun?

a)

b)

c)

16.

Planets orbit the Sun in a shape called a(n):

a)

circle

b)

ellipse

c)

orbit

d)

focus

17.

Kepler's first law is about:

a)

the shape of the orbit

b)

the time it takes for a planet to orbit

c)

the distance or speed a planet orbits

d)

how fast a planet spins

18.

An orbit is:

a)

The path an object takes as it revolves around another object

b)

The process of an object traveling around another object

c)

The direction an object takes as it travels around another object.

d)

The angle which an object moves around another object.

19.

When a planet orbits the Sun, one of the foci of the elliptical orbit is the Sun. What is at the other focus?

a)

The Earth

b)

The moon

c)

A black hole

d)

Nothing

20.

From which options below would the planet appear to be moving the fastest?

a)

Position A to B

b)

Position B to C

c)

Position H to I

d)

Position I to J

21.

Celestial bodies (like planets) orbit because of balanced forces between:

a)

gravity and the mass of the objects

b)

gravity and motion of the orbiting object

c)

gravity and the centripetal force

d)

gravity and the centrifugal force

22.

In orbits with low eccentricity (select ALL that apply):

a)

have the foci close together

b)

have the foci far apart

c)

are very long and elliptical

d)

are nearly circular

23.

The gravitational field around an object is represented by:

a)

$g\ =\ \frac{GM}{r^2}$

b)

$F_{e\ }=\ k_e\frac{\ q_1q_2}{r^2}$

c)

$F_g\ =G\ \frac{m_1m_2}{r^2}$

d)

$F_g\ =\ gm$

24.

The gravitational field around an object is represented by:

a)

$g\ =\ \frac{GM}{r^2}$

b)

$F_{e\ }=\ k_e\frac{\ q_1q_2}{r^2}$

c)

$F_g\ =G\ \frac{m_1m_2}{r^2}$

d)

$F_g\ =\ gm$

25.

The gravitational force on Earth is:

a)

$9.8\ N$

b)

$9.8\ \frac{m}{s^2}$

c)

$6.0\ x\ 10^{24}\ kg$

d)

unknown without another object's mass

Planetary Motion

Total questions: 25

Worksheet time: 13mins

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