Quiz: Motion and Force

Net force is

• the force acting in the same direction as an object's movement.

• the force acting in the opposite direction of an object's movement.

• the combination of all the forces acting on an object.

• the force of gravity pulling an object down.

An object experiencing balanced forces

• has a net force of zero.

• is speeding up.

• is slowing down.

• stops moving.

A game of tug-of-war is an example of

• rolling friction.

• air resistance.

• streamlining.

• unbalanced forces.

Which is an example of static friction?

• pulling a skier behind a boat

• pushing a box that is at rest

• braking a car going down a hill

• driving a car up a hill

Which is not an example of sliding friction?

• ice skating on a frozen pond

• taking notes with a pencil

• rolling a ball across a desk

• pushing a book across a table

In order to increase a car's speed, the force pushing it forward must be

• a. a negative force.

• b. rolling friction.

• c. equal to the force of friction.

• d. greater than the force of friction.

The friction between objects that are stationary is called

• static friction.

• rolling friction.

• fundamental friction.

• kinetic friction.

Which is an example of helpful friction?

• wearing batting gloves

• sprinkling sand on an icy road

• applying the brakes on a car

• All of the above

Which of the following requires friction?

• cleaning a pan

• writing a letter

• skiing

• All of the above

Using lubricants on engine parts is an example of reducing

• force.

• friction.

• acceleration.

• motion.