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Newton's Universal Law of Gravitation

Total questions: 25

Worksheet time: 30mins

Name
Class
Date
1.

When placed at equal distances apart, the greatest gravitational attraction will be between two

a)

skateboards

b)

bowling balls

c)

school buses

2.

Which is needed to determine the amount of gravitational force between two objects?

a)

distance and mass

b)

weight and time

c)

area and weight

3.

The gravitational force exerted by an object depends on its

a)

volume

b)

mass

c)

weight

4.
What is gravitational force?
a)
It makes objects at rest start moving.
b)
It makes objects that are moving stop.
c)
The force of attraction between two objects.
d)
It pulls you into space.
5.

Gravity on moon is less than the gravity on earth because

a)

a. moon's mass is less

b)

b. moon's mass is more

c)

c. moon's mass is equal to Earth

d)

d. moon has no mass

6.
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
7.

What is the proper setup of the gravitational force formula?

a)

Fg= Gm2/r

b)

F=ma

c)

Fg= Gr2/(m1+m2)

d)

Fg= G (m1m2)/r2

8.

What effect does increasing the distance between the two objects do to the gravitational force?

a)

The distance between two objects has no effect on the gravitational force

b)

It increases

c)

It stays the same

d)

It decreases

9.

When do gravitational forces exist between two objects?

a)

They only exist between microscopic objects.

b)

They are always present between any two objects.

c)

Gravitational forces only act on objects falling on Earth.

d)

They only exist for objects in space.

10.

Calculate the gravitational force between a 15-kg chinchilla and a 65-kg dog which are separated by 0.30 m.

a)

Fg = 3.7*10-8 N

b)

Fg = 1.3*1012 N

c)

Fg = 1.1*105 N

d)

Fg = 7.2*10-7 N

11.

What would the gravitational force be between the Sun and Mars if they were 2.3*1011 m apart? The masses for the Sun and Jupiter are 1.99*1030 kg and 6.42*1023kg, respectively.

a)

Fg = 3.8*1015 N

b)

Fg = 2.8*10-42 N

c)

Fg = 1.6*1021 N

d)

Fg = 4.6*10-75 N

12.

What does the variable G in the gravitational force equation represent? Fg = G m1 m2r2F_g\ =\ G\ \frac{m_1\ m_2}{r^2}  

a)

Universal gravitational constant

b)

Combined masses of the two objects

c)

Gravitational force

d)

Dielectric constant

13.

Which of the following changes would increase the gravitational force between two objects?

a)

Increase G

b)

Increase the mass

c)

Increase r

d)

Decrease G

14.

What is the gravitational force between a 140 kg tree and a 798 kg Lotus Elise Sprint that are 15 m away?

a)

6.6*10-7 N

b)

4.8*104 N

c)

3.3*10-8 N

d)

7.4*1012 N

15.
Which of the following is true?
a)
m1 feels more force
b)
m2 feels more force
c)
they feel equal forces
d)
the net force is zero, so they feel no force
16.
If you double the mass of m2, by what factor will the gravitational force change?
a)
F/2
b)
2F
c)
4F
d)
F/4
17.
How are mass and gravitational force related?
a)
indirectly
b)
inversely
c)
inverse squarely
d)
directly
18.
If you double the distance between m1 and m2 and triple the mass of m1, by what factor will the gravitational force change?
a)
3F/4
b)
3F/2
c)
4F/3
d)
5F
19.
How are distance and gravitational force related?
a)
indirectly
b)
inversely
c)
inverse squarely
d)
directly
20.
How can you explain that we have a stronger gravitational attraction with Earth than the Sun?
a)
The sun has a larger mass
b)
The sun has a smaller mass
c)
Closer to center of sun
d)
Closer to center of Earth
21.
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)
My mother
d)
Inertia & gravity
22.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
23.

Which configuration will result in the greatest gravitational force?

a)

small masses far apart

b)

large masses far apart

c)

small masses close together

d)

large masses close together

24.

The number 6.67 x 10 -11 N* m2 / kg2 is called the

a)

Universal speed constant

b)

centripetal force

c)

Universal Gravitational constant

d)

Earth's Gravitational constant

25.
The law of universal gravitation is credited to whom?
a)
Einstein
b)
Galileo
c)
Darwin
d)
Newton

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