Which of the following is an example of exerting a force?

• a child running through a field

• a train speeding down a track

• a carpenter hammering a nail

• an airplane soaring through the sky

What happens when two forces act in the same direction?

• they cancel each other out

• the stronger one prevails

• they add together

• their sum divided by two is the total net fource

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NGSS.MS-PS2-2

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

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NGSS.MS-PS2-2

The force that one surface exerts on another when the two rub against each other is called

• friction

• acceleration

• inertia

• gravity

Air resistance is a type of

• motion

• acceleration

• velocity

• friction

Any forces that causes an object to move in a circle is called a(an)

• balanced force

• unbalanced force

• gravitational force

• centripetal force

In physical science, a push or a pull is called a(an)

• force

• acceleration

• inertia

• motion

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

The SI unit for force is the

• newton

• meter

• kilogram

• pound

When an object's distance from another object is changing

• it is in motion

• it is speeding

• it has a high velocity

• it is accelerating