Linear Motion

If you know how far an object travels in a certain amout of time you can calculate

• displacement
• speed
• acceleration
• momentum

Because velocity has both a magnitude and a direction it is a 

• distance
• speed
• scalar
• vector

A reference point

• is the origin on a graph.
• is used to detect the motion of an object.
• is used to calculate acceleration.
• is used to by the speaker in a debate.

To calculate acceleration a person must know

• the speed limit.
• change in time over the position of the object.
• the initial velocity, final velocity and the time for the velocity to change.
• the change in position of the object in a certain period of time.

Sarah runs at a constant velocity around a track.  Sarah is

• not accelerating because her velocity remains constant.
• not accelerating because she must change her velocity and direction.
• is accelerating because she is changing her direction. 
• is accelerating because she is changing her velocity and direction.

What is the speed of a cart that is rolls 60 meters in 12 seconds?

• 5 m/s
• .2 m/s
• 5 m/s²
• .2 m/s²

The SI units for acceleration is

• m/s
• km/s²
• m/s²
• ft/min

What is this graph showing?

• Constant Speed
• Acceleration (speeding up)
• Deceleration (slowing down)
• No motion

Tags

NGSS.MS-PS3-1

From the 3rd second to the 5th second, the object is

• moving at a constant speed
• speeding up
• not moving
• slowing down

Vector quantities need both a magnitude and a _____.

• distance
• displacement
• direction
• velocity