Forces, Friction and Inertia

Larger masses have a

• weaker gravitational force

• stronger gravitational force

• equal gravitational force

Because of inertia, a moving object will keep ________.

• at rest
• moving
• in one spot
• inertia 

Because of inertia, a resting object will remain at ________.

• rest
• a constant speed
• school
• inertia 

Objects with greater _________ also have greater inertia.

• speed
• mass
• temperature
• friction

What would happen to the planets in the solar system if the sun’s gravitational force were to suddenly disappear?

• They will stop moving and become static.
• They will stop spinning.
• They will fly away in straight lines.
• They will start moving toward the Sun

When Sean was riding his bike and braked suddenly, he kept moving forward due to

• gravity

• friction

• inertia

• weight

What is the best definition of inertia?

• a force that pushes objects down

• a property of matter that makes objects stop

• a force that keeps objects from breaking down

• a property of matter which resists change to the state of motion or rest

An object in motion tends to stay in motion unless an ___ force acts on it.

• unbalanced
• balanced

The law of inertia (Newton’s First Law) applies

• to both moving and nonmoving objects
• only to moving objects
• only to objects that are not moving

Because of inertia, a moving object will keep ________ unless acted on by an unbalanced force.

• at rest

• moving

• in one spot

• inertia