Motion, Acceleration, and Forces Test

Why don’t you have to see an object move to know that it moved?

• Because its position can change relative to a reference point

• Because it makes a sound

• Because it changes color

• Because it gets bigger

Tags

NGSS.MS-PS2-5

What is a reference frame?

• A group of objects that are not moving relative to each other

• A moving vehicle

• A type of mailbox

• A measurement of speed

If you are sitting inside a moving car and look at another passenger, how do you appear to each other?

• You appear not to be moving.

• You appear to be moving very fast.

• You appear to be moving backward.

• You appear to be floating.

Which formula should you use to find the displacement when an object moves in two perpendicular directions (e.g., north then east)?

• c² = a² + b²

• F = ma

• v = d/t

• E = mc²

If a person moves 4 meters north and then 3 meters east, what is the magnitude of their displacement?

• 5 meters

• 7 meters

• 12 meters

• 1 meter

Explain why the displacement is less than the total distance traveled in the given scenario.

• Displacement is the shortest straight-line distance between two points.

• Displacement is always equal to distance.

• Displacement is always greater than distance.

• Displacement and distance are unrelated.

What is the SI unit for measuring speed?

• Meters per second (m/s)

• Kilograms (kg)

• Seconds (s)

• Newtons (N)

Which of the following best defines instantaneous speed?

• Speed at a single instant of time

• Total distance divided by total time

• Change in velocity over time

• Distance traveled in one hour

How is average speed calculated?

• Total distance divided by total time

• Speed at a single instant of time

• Total time divided by total distance

• Change in speed over time

A car travels a certain distance in a given time. If you know the distance and the time, what information is still unknown before you solve the problem?

• The speed

• The distance

• The time

• The direction