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Gravity
Test Description: Gravity Review Questions!
Instructions: Answer all questions to get your test result.
1) Why does the Moon orbit the Earth?
A
The mass of Earth is much greater than the Moon.
B
The velocity of the Moon in orbit is faster than the velocity of Earth in orbit around the Sun.
C
The Moon came into orbit around Earth after Earth was established.
D
The Moon is less dense than Earth.
2) If the Moon moved farther away from Earth, what would happen to the gravitational force between Earth and the Moon?
A
The force would decrease by the inverse square of the distance.
B
The force would increase proportional to the distance.
C
The force would decrease proportional to the distance.
D
The force would increase by the inverse square of the distance.
3) What is the formula for the law of universal gravitation?
A
Force = G * mass1 * mass2 / distance
B
Force = G * mass1 * mass2 * distance2
C
Force = G * mass1 * mass2 / distance2
D
Force = G * mass1 * mass2 * distance
4) If two asteroids moved closer together, what would be the result on the gravitational force each asteroid exerts on the other?
A
The gravitational force would decrease.
B
The gravitational force would increase.
C
The gravitational force would remain the same.
D
None of these
5) Which of Kepler's laws gave Newton the idea about gravitational force and how it is related to distance?
A
law of relativity
B
law of ellipses
C
law of universal gravitation
D
law of equal areas
6) Which of the following BEST describes the term terminal velocity
A
the force of the air pushing on a moving object
B
the density of the air around an object
C
the weight of the air pushing down on an object
D
the temperature of the air around a moving object
7) Terminal velocity is the velocity of _______
A
a falling object if the force of air resistance equals the force of gravity
B
a falling object when it starts to break apart
C
an accelerating object when it hits the ground
D
an object falling in a vacuum (an environment without air)
8) In a vacuum (an environment without air), what will happen when two objects with different mass are dropped at the same time from the same height?
A
There is no way to test this condition.
B
The more massive object lands first.
C
The less massive object lands first.
D
They both land at the same time.
9) Which factor increases the air resistance on an object?
A
more surface area facing the force of air
B
decreasing the density of the object
C
decreasing air pressure
D
less surface area facing the force of air
10) Which of the following is a true statement about objects in a vacuum?
A
Both a feather and a bowling ball can’t fall, but will always remain motionless.
B
A feather will fall faster than a bowling ball.
C
A feather will fall slower than a bowling ball.
D
A feather and a bowling ball will fall at the same rate.
*select an answer for all questions
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