Question 1

Galileo's concept of the resistance to a change of motion

Accepted Answer

inertia

Answer

momentum

Answer

motion

Answer

space

Question 2

Use inertia to explain why you feel pressed back into the seat of a car when it accelerates.

Accepted Answer

Because of your inertia, your body tends to remain in place. The car seat causes you to accelerate, therefore, by exerting force on your back.

Answer

all of the above

Answer

Because of your gravity, your body tends to remain in place. The car seat causes you to accelerate, therefore, by exerting force on your back.

Answer

Because of your inertia, your body tends to remain in place. The car seat causes you to accelerate, therefore, by exerting force on your front.

Question 3

How could you keep an object's acceleration the same if the force acting on the object were doubled?

Accepted Answer

your could double the object's mass

Answer

all of the following

Answer

your could tripple the object's mass

Answer

your could double the object's motion

Question 4

Explain why a car with a large mass might use more fuel than a car with smaller mass. Assume both cars drive the same distance.

Accepted Answer

A greater force is required to accelerate a more massive car, therefore, more engine power and more fuel are needed.

Answer

A greater force is required to accelerate a most massive car, therefore, more engine power and more fuel are needed.

Answer

A greater friction is required to accelerate a more massive car, therefore, more engine power and more fuel are needed.

Answer

A lesser force is required to accelerate a more massive car, therefore, more engine power and more fuel are needed.

Question 5

_______________ is a characteristic of a moving object that depends on both the mass and the velocity of the object.

Accepted Answer

momentum

Answer

friction

Answer

force

Answer

space

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