Forces in Motion

The unit of force, a Newton, is equal to

• The amount of mass in an object

• Mass X Velocity

• kg●m/s

• kg●m/s²

The amount of matter in an object is called its

• inertia

• mass

• force

• balance

The force that pulls falling objects toward Earth is called

• gravity

• free fall.

• acceleration.

• air resistance.

When the only force acting on a falling object is gravity, the object is said to be

• stationary

• decelerating

• in free fall.

• a projectile

Air resistance is a type of

• motion.

• acceleration.

• velocity

• friction

Objects falling through air experience a type of friction called

• terminal velocity.

• air resistance.

• inertia.

• rolling friction

The tendency of an object to resist change in its motion is known as

• mass

• inertia

• force

• balance

The greater the mass of an object,

• the easier the object starts moving

• the greater its inertia

• the more balanced it is

• the more space it takes up

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail

• creates a friction with the hammer.

• disappears into the wood

• exerts an equal force back on the hammer

• moves at a constant speed.

How can you increase the momentum of an object?

• by decreasing its velocity

• by increasing its mass

• by increasing its friction

• by decreasing its acceleration