Review

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²

• 18 m/s²

• 16 m/s²

• 16 m/s

Tags

NGSS.HS-PS2-1

What segment of the graph shows no motion, or standing still?

• A - B

• B - C

• C - D

• None

Describe motion of C - D.

• Constant velocity away from the origin

• Slowing down away from the origin

• Slowing down away from the origin and then slowing down towards the origin

• Slowing down away from the origin and then speeding up towards from the origin

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What does a horizontal line (not on the x-axis) mean on a V-T graph?

• No movement

• Constant velocity

• Changing velocity

• Change in direction

What kind of line on a P-T graph would create the segment B - C on this V-T graph?

• Straight, linear line

• Horizontal line

• Curved line

• Wouldn't happen

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s

• -7.5 m/s²

• -0.5 m/s²

• 7.5 mi//hr

Tags

NGSS.HS-PS2-1

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 

• velocity of an object.

• distance divided by the time interval 

• velocity divided by the time interval 

Tags

NGSS.HS-PS2-1

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.

• A car approaching a red light

• A car with the cruise control set at 80 km/h

• A car turning a curve at a constant speed

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Which graph shows the object standing still?

• A

• B

• C

• D

Which graph demonstrates the greatest positive speed?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1