Motion, Speed, Velocity, Acceleration, Force, Friction, Gravity

A change in velocity over time is

• Scalar
• Speed
• Acceleration
• Motion

Which is an example of zero acceleration?

• A merri-go-round moving at a constant rate
• A car coming to a stop
• A boat speeding up
• A person running on a treadmill at a rate of 6 MPH

Morgan walks 10 miles South. Trevor walks 10 miles North in the same amount of time.  They have:

• Different average speeds
• Different velocities
• Same velocity
• Same motion

The difference between speed and velocity is

• Velocity involves time, speed does not
• Velocity has direction while speed does not
• Speed involves time while velocity does not
•  Speed involves direction while velocity does not

An object is _____ if its position changes relative to another object.

• in motion
• at reset
• a frame of refence
• magical

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

• comparison point
• reference point
• point of view
• motion detector

All motion is described as relative because

• how do you ever really know if something is in motion
• motion means different things to different people
• everything in the universe is constantly in motion, so it depends on your frame of reference

Velocity is

• speed and acceleration
• constant speed
• a frame of reference
• speed in a given direction

Speed =

• distance / time
• time / distance
• distance * time

Acceleration is

• increasing speed
• decreasing speed
• changing direction
• all of the above