SC Ch 5 Force & Motion

The rate at which the speed or the direction of motion of an object changes over time is

• force
• intertia
• acceleration

________________ is the force that results when two materials rub against each other or when their contact prevents sliding.

• force
• intertia
• friction

Which of the following is a contact force?

• gravity
• magnetism
• friction

Magnetism can act at a distance.

• True
• False

says that an object will stay in uniform motion unless a net force acts on the object.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

"If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object." The forces are equal in strength and opposite in direction.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

The tendency of an object to resist any change in motions is known as:

• rest
• inertia
• changes

Magnetism is not at contact force. (True or False)

• True
• False

Friction is a kind of force.( True or False)

• True
• False

Gravity acts on both light and heavy objects. (True or False)

• True
• False