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Universal Gravitation

Total questions: 22

Worksheet time: 11mins

Name
Class
Date
1.
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
2.
Force of gravity is directly proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
3.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
4.

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?  Fg = Gm1m2 / r2

a)

F = 3x less

b)

F = 2x less

c)

F= 6x less

d)

F = 9x less

5.
Which of the following is Newton's Law on Gravitation?
a)
F=Gm1m2/r
b)
F = Gm1m2/r2
c)
F = Gm1m2/2r
d)
F = m1m2/2r
6.
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
7.

The sun is the anchor point of our solar system because of

a)

the gas Hydrogen

b)

its small density

c)

its huge mass

d)

its location

8.
A moon is located at  1 unit out from the planet it orbits. If that moon was orbiting at 2 units out from the planet, how much would the gravitational force on the moon be compared to its distance at 1 unit?
a)

1/4 as much

b)

1/6 as much

c)
2x as much
d)
4 times as much
9.
Ocean tides occur mainly because 
a)
water normally runs to the side of Earth away from the sun
b)
of the gravitational pull of the sun on Earth
c)
of different gravitational pulls of the moon on opposite sides of Earth
d)
as Earth rotates it leaves the ocean water somewhat behind it
10.
How are mass and weight different?
a)
Mass is the amount of matter in an object;Weight is the amount of gravitational force acting on the object
b)
Mass is the amount of gravitational force acting on an object;Weight is the amount of matter in an object
c)
Mass is a thing;Weight is a place
d)
Mass is an animal;weight is a human
11.

The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter? think: what is the difference between mass and weight, no calculation needed !

a)
50 kg and 490 N
b)
100 kg and 490 N
c)
50 kg and 980 N
d)
100 kg and 980 N
12.
A planet moves fastest during its orbit around the Sun at the when 
a)
it is closest to the sun and gravity has a stronger pull
b)
it is farthest from the sun and gravity has a stronger pull
c)
it is closest to the sun and gravity has a weak pull
d)
it is farthest from the sun and gravity has a weak pull
13.
Why don't satellites get closer to the Earth even though the Earth pulls on them?
a)
The pull from the sun cancels their movement
b)
The pull from the moon cancels their movement
c)
They are out of Earth's gravitational field
d)
They fall at the same rate that the Earth curves away from them
14.
A person on the Earth weighs 180 pounds. How much will they weigh on the moon? ( Note: The moons "g" is1/6 that of Earth)
a)
30 lbs
b)
360 lbs
c)
0- you are weightless in space
d)
18 lbs
15.
The units of velocity are
a)
kg
b)
m
c)
m/s
d)
N
16.
The units of acceleration are
a)
kg
b)
m/s2
c)
m/s
d)
N
17.
If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?
a)
Neither, there is no gravity on the moon.
b)
hammer because it has more mass
c)
feather because it has less mass
d)
both will hit at the same time
18.
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
19.

What is the value of gravitation constant...

a)

3×108 ms−13\times10^8\ ms^{-1}

b)

6.67 ×10−11 Nm2kg−26.67\ \times10^{-11}\ Nm^2kg^{-2}

c)

6.63×10−9 Nm26.63\times10^{-9\ }Nm^2

20.

If the two masses of two objects are doubled, the force of gravitational attraction between them ______.

a)

Doubles

b)

Quadruples

c)

Cut in Half

d)

4x Smaller

21.

If the objects are closer to each other, the force of attraction ____________.

a)

no effect

b)

decreases

c)

increases

d)

disappear

22.

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. Fg = Gm1m2 / r2 ; G = 6.67 x 10-11 N*m2/kg2 ; r = distance

a)

130565.25 m

b)

361.34 m

c)

0.19575 m

d)

0.783 m

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