Chapter 9 Quiz

_______________ is the distance and direction of an object's change of position from a starting point.

• Distance

• Displacement

• Motion

• Velocity

A place or object used to determine if another object is in motion is called a

• reference point.

• point of view.

• motion detector.

• motion point.

After completing one trip on a roller coaster, the roller coaster's ______________________ is zero.

• length

• displacement

• reference point

• distance

What TWO things do you need to know about an object to calculate it's velocity?

• speed

• time

• direction

• acceleration

A correct measure of velocity would be

• 7,800 m/s

• 40 km/hr north

• 300 m/hr

Acceleration only takes place when things speed up.

• True

• False

When a car goes around a corner at 20 mph, why do we say it accelerates?

• The car is accelerating because the velocity is constant.

• Cars always accelerate when they are in motion.

• The car accelerates because it is going 20 mph.

• The car is accelerating because it is changing direction.

Acceleration of an object happens when things __________.

• slow down

• go faster

• change direction

• all of the above

Energy due to motion is _______________ energy.

• potential

• kinetic

• friction

• gravitational potential

Energy due to position is __________________ energy.

• potential

• kinetic

• friction

• thermal