A _____________ is a place or object used for comparison to determine if something is in motion.

• Newton's pendulum

• reference point

• guiding position

• motion detector

Three vehicles are traveling at the same speed in the same direction. The front of the white van is at -21 m. What is the point of reference?

• A. the front of the red car

• B. the front of the black car

A force is a push or pull. True or False?

• True

• False

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

• a carpenter hammering a nail

• an airplane soaring through the sky

• a child running through a field

• a train speeding down a track

Which of the following are examples of external forces?

• Friction

• Gravity

• Surface Area Tension

• All of the above

An object at rest stays at rest unless acted upon by an external force. This is an example of .......

• Newtons First Law

• Newtons 2nd Law

• Newtons Third Law

• Molecular Motion

Force is equal to mass multiplied by acceleration. This is ......

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• None of the above

A male skater and female skater are facing each other. The male skater pushes the female skater backward. Based on Newton’s third law, which sentence BEST explains what will occur?

• A. The skaters will exert an equal force on each other, and neither will move.

• B. When the male skater exerts a force on the female skater, she will skate forward

• C. When the male skater exerts a force on the female skater, she will exert the same force on him, pushing them both backward.

• None of the above

For every action there is an equal or opposite reaction. This is .....

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• All of the above

If the black car traveled from 21 m to its current position in 10 seconds, what was the the black car's average speed?

(S= D/T)

• A. 2.5 m/s

• B. 2.1 m/s

• C. -2.5 m/s

• D. -2.1 m/s