Laws of Motion

A force is defined as

• A push only

• A pull only

• A push or a pull

• None of the above

What unit do scientists use to measure force?

• Newton

• Grams

• Meters

• Meter per second

Which force always pulls downward on objects?

• Support force

• Friction force

• Gravity

• Air resistance

A change to an object's motion is caused by...

• Balanced forces

• Unbalanced forces

• Acceleration

• Velocity

A force that opposes motion between two surfaces that are in contact is called __________

• friction

• motion

• velocity

• acceleration

What is the common unbalanced force acting on an object in motion?

• Inertia

• Acceleration

• Friction

• Speed

Which of the following balls has the greatest inertia?

• A ping pong ball

• A soccer ball

• A tennis ball

• A bowling ball

The inertia of an object is related to its

• mass and speed

• mass and force

• mass only

• speed only

The amount of matter in an object is called its

• inertia

• balance

• force

• mass

The greater the mass of an object,

• the easier the object starts moving.

• the more balanced it is.

• the greater its inertia.

• the more space it takes up.