Motion, Acceleration, and Forces Test

What is the best suggestion about observing motion?

• You don’t have to see an object move to know that it moved

• You must see an object move to know that it moved

• You need to measure the speed to know that it moved

• You need to hear the object to know that it moved

What does it mean when we say "motion is relative"?

• Motion is the same in all reference frames.

• Motion depends on the reference frame that is chosen.

• Motion is independent of the observer.

• Motion is always constant.

When you are inside a moving car, how do you appear to yourself?

• You appear to be moving.

• You appear to be stationary.

• You appear to be moving backward.

• You appear to be moving faster.

When you are outside a moving car, how does the car appear to you?

• The car appears to be stationary.

• The car appears to be moving.

• The car appears to be moving backward.

• The car appears to be moving faster.

What is the total distance traveled if an object moves 50 meters north and then 30 meters south?

• 80 meters

• 20 meters

• 50 meters

• 30 meters

How is displacement different from distance?

• Displacement includes direction, distance does not.

• Displacement is always greater than distance.

• Distance includes direction, displacement does not.

• Distance is always less than displacement.

If an object travels 50 meters north and then 30 meters south, what is its displacement?

• 20 meters north

• 80 meters north

• 20 meters south

• 80 meters south

What is the total distance traveled if a person moves 4 meters north and then 3 meters east?

• 5 meters

• 7 meters

• 12 meters

• 1 meter

What is the displacement of a person who moves 4 meters north and 3 meters east?

• 5 meters NE

• 7 meters NE

• 12 meters NE

• 1 meter NE

What is the SI unit for speed?

• Kilometers per hour (km/h)

• Meters per second (m/s)

• Miles per hour (mph)

• Feet per second (ft/s)