Ch 10 Forces Test

What is the SI unit for force?

• meter
• meters per second
• newton
• watt

When the forces acting on an object are balanced, the net force on the object is

• less than 0 N
• equal to 0 N
• more than 0 N
• 100 N

When the forces acting on an object are unbalanced, the net force on the object is

• more or less than 0 N
• equal to 0 N
• more or less than 0 W
• equal to 0 W

Friction acts

• in the same direction as motion
• only on objects that are not in motion
• in the opposite direction as motion
• only on objects that are in fluids

The friction on an object moving through water or air is

• static friction
• rolling friction
• sliding friction
• fluid friction

The amount of gravity between two objects depends on their masses and the 

• distance between them
• friction between them
• total velocity of the objects
• net force of the objects

The force of gravity on an object is known as its

• friction
• acceleration
• mass
• weight

Air resistance acts in what direction on a falling object?

• upward
• sideways
• downward
• backward

A (an) _____ causes an object's motion to change. 

• zero force
• inertia
• balanced force
• unbalanced force

Newton's third law says that for every action there is an equal and opposite reaction. This law says that forces

• do not act on moving objects
• only act on moving objects
• come in action-reaction pairs
• act only in the opposite direction of motion