Forces and Momentum Review

which of the following is the cause of an acceleration?

• speed
• inertia
• force
• velocity

Tags

NGSS.MS-PS2-2

Which of the following statements does NOT describe force?

• Force causes objects at rest to remain stationary.
• Force causes objects to start moving.
• Force causes objects to stop moving.
• Force causes objects to change direction.

The free body diagram shown below represents a car being pulled by a towing cable. In the diagram, which of the following is the gravitational force acting on the car?

• 5800 N
• 775 N
• 14,700 N
• 13,690 N

Tags

NGSS.MS-PS2-4

If a nonzero net force is acting on a object, then the object is definitely

• at rest.
• moving with constant velocity.
• being accelerated.
• losing mass.

Tags

NGSS.MS-PS2-2

A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situation.

• The nail exerts a force on the hammer; the hammer exerts a force on the wood.
• The hammer exerts a force on the nail; the wood exerts a force. on the nail.
• The hammer exerts a force on the nail; the nail exerts a force on the hammer.
• The hammer exerts a force on the nail; the hammer exerts a force on the wood.

Tags

NGSS.MS-PS2-1

The SI unit of force is the

• joule.
• kilogram.
• meter.
• newton.

When an unbalanced force acts on an object,

• the object's motion does not change.
• the object accelerates.
• the weight of the object decreases.
• the inertia of the object increases.

Tags

NGSS.MS-PS2-2

When a pair of balanced forces acts on an object, the net force the results is

• greater in size than both forces combined.
• greater in size than one of the forces.
• equal in size to one of the forces.
• equal to zero.

Tags

NGSS.MS-PS2-2

What kind of friction occurs as a fish swims through water?

• fluid
• rolling
• sliding
• static

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

• acts in the direction of motion.
• equals the weight of the box.
• is usually greater than static friction.
• acts in the direction opposite of motion.