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Universal Gravitation

Total questions: 40

Worksheet time: 38mins

Name
Class
Date
1.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)

Law of Conservation of Energy

d)
Inertia & gravity
2.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
3.
Force of gravity is directly proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
4.
If I double the distance between two objects, what happens to their gravitational Force?
a)
4x bigger
b)
4x smaller
c)
2x bigger
d)
2x smaller
5.

If I double the mass of one object, but don't change anything else... What happens to the gravitational force between two objects?

a)
Doubles
b)
Quadruples
c)
Cut in Half
d)
4x Smaller
6.
What happens to Gravitational force if I double both of the masses but don't change their distance?
a)
doubles
b)
half as big
c)
4x bigger
d)
4x smaller
7.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
8.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if the distance between them were doubled?
a)
9
b)
18
c)
72
d)
144
9.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
10.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

a)

2.96x10-9N

b)

3.00x10-6N

c)

2.22x10-9N

d)

2.23x10-8N

11.

How is the gravitational force between to objects related to their mass

a)

They are directly proportional

b)

They are inversely proportional

c)

They do not affect each other

d)

They are equal

12.

If the distance between 2 masses is increased then the force of gravitation between them will...

a)

increase

b)

decrease

c)

stay the same

13.

If the mass of either m1 or m2 is increased then the force of gravitation between them will...

a)

increase

b)

decrease

c)

stay the same

14.

Which of the following formulas is the correct equation for the law of Universal gravitation?

a)

F=GM1M2r2F=\frac{GM_1M_2}{r^2}

b)

F=mgF=mg

c)

F=Gd2m1m2F=\frac{Gd^2}{m_1m_2}

d)

F=KQ1Q2d2F=\frac{KQ_1Q_2}{d^2}

15.

Find the distance between two objects whose masses are m1 = 4,500 kg, and m2 = 8,700 kg; if the gravitational force between them is F = 2.0 x 10-8 N.

a)

130565.25 m

b)

361.34 m

c)

0.19575 m

d)

0.783 m

16.

If I double the mass of one object without changing anything else, What would happen to the gravitational force between that object and any other object?

a)

Doubles

b)

Quadruples

c)

Cut in Half

d)

14\frac{1}{4}  as much

17.

A man who weighs 1000N on the surface of the earth will weigh how much at twice the distance in the atmosphere.

a)

500 N

b)

250 N

c)

2000 N

d)

4000N

18.

At what point is the force of gravity on an object greatest

a)

At the center of the earth (Core of the earth)

b)

At twice the distance from the surface of the earth

c)

At the surface of the earth

d)

The force of gravity ios the same irrespective of distance from the center of the earth

19.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
20.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
21.

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

a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
22.

Compared to the gravitational field of Earth at its surface, Earth’s gravitational field at Earth’s center is

a)

zero

b)

.half as much

c)

twice as much

d)

.three times as much

23.
A newly discovered planet is found to have 2/3 the density of earth and twice the radius.
The surface planetary gravity is?
a)
1.7 m/s2
b)
3.3 m/s2
c)
6.7 m/s2
d)
13 m/s2
24.
If the mass of Earth increased, with no change in radius, your weight would _____.
a)
increase also
b)
stay the same
c)
decrease
25.

The graphical relationship between Fg of Earth on a man and distance between Earth and man is:

a)
b)
c)
d)
26.

The graphical relationship between Fg of Earth on another planet and the mass of the planet is:

a)
b)
c)
d)
27.

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

a)

a stronger force than the Moon attracts the Earth.

b)

a weaker force than the Moon attracts the Earth.

c)

the same force as the Moon attracts the Earth.

d)

a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

28.

What is T?

a)

period

b)

mass

c)

velocity

d)

frequency

29.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
30.
Where is the planet moving faster
a)
Position A to B
b)
Position B to C
c)
Position H to I
d)
Position I to J
31.
A planet moves __________ when it is farthest from the sun.
a)
faster
b)
slower
32.
The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 
a)
longer
b)
shorter
33.

The diagram below shows a moon revolving around a planet in an elliptical orbit. At which position is the moon traveling fastest?

a)

location 1

b)

location 2

c)

location 3

d)

location 4

34.

Which planet will take the least amount of time to revolve around the Sun?

a)

Mercury

b)

Venus

c)

Earth

d)

Mars

35.

The period of Jupiter is 4,344 days. This tells you how long it takes _?_.

a)

Jupiter to orbit the sun.

b)

Jupiter to rotate one time on its axis.

c)

the sun to orbit Jupiter.

d)

Earth to orbit Jupiter.

36.

Newton’s law states that for every action, there is an ________ reaction.

a)

unequal and opposite

b)

equal and similar

c)

stronger and opposite

d)

equal and opposite

37.

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

a)

False

b)

True

38.

When a heavy football player and a light one run into each other, who exerts more force

a)

The light one

b)

Their force are equal

c)

The heavy one

39.

What is the nature of gravity according to Newton's Law of Universal Gravitation?

a)

Repulsive force

b)

Attractive force

c)

Electromagnetic force

d)

Nuclear force

40.

Without gravity, the stars, planets and all objects in the universe would _______.

a)

continue to orbit each other

b)

move in a random direction

c)

move in a straight line

d)

stop moving

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