Motion, Speed, Velocity, Acceleration Test

What two things change when an object is in motion?

All matter in the universe is constantly in ______________.

A position describes an object's location compared to _____________.

• its motion

• a reference point

• its speed

• vector

Acceleration measures a change in _____________.

Motion is a change in

• acceleration over time

• speed over time

• position over time

• velocity over time

Bob know that his friend runs 100 m in 8 s. He could use this to calculate his friend's

• position

• speed

• motion

• acceleration

Mary and Keisha run with the same constant speed but in opposite directions. The girls have

• the same position

• different accelerations

• different speeds

• different velocities

A swimmer increases her speed as she approaches the end of the pool. Her acceleration is

• in the opposite direction as her motion

• in the same direction as her motion

• at right angle to her motion

• zero

A car traveling at 40 m/s slows down to 20 m/s. During this time, the car has

• no acceleration

• positive acceleration

• negative acceleration

• constant velocity

A vector is a quantity that has

• speed

• acceleration

• position and distance

• size and direction