Speed, velocity & acceleration

Mark slams on the brakes after traveling 25 m/s. It takes him 3 seconds to come to a complete stop. What is his acceleration?

• 8.33 m/s²

• -8.33 m/s²

• 75 m/s²

• -75 m/s²

Tags

NGSS.HS-PS2-1

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Tags

NGSS.HS-PS2-1

A bicyclist begins moving with a velocity of 10 m/s and then decreases his velocity to 6 m/s in 2 seconds. What is the acceleration of the bicyclist?

• 4 m/s²
• -4 m/s²
• 2 m/s²
• -2 m/s²

Tags

NGSS.MS-PS2-2

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

What is the motion shown in this velocity time graph?

• moving with a constant positive velocity

• Speeding up in the positive direction

• slowing down in the positive direction

• speeding up in the negative direction

Tags

NGSS.HS-PS2-1

What is the motion shown in this velocity time graph?

• moving with a constant positive velocity

• Speeding up in the positive direction

• slowing down in the positive direction

• speeding up in the negative direction

Tags

NGSS.HS-PS2-1

What is this graph representing?

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

Tags

NGSS.MS-PS3-1

In which of the following graphs (click the image) are both runners moving at the same speed (note that graph c is the bottom right graph, and graph d is the bottom left graph)? 

• Graph A
• Graph B
• Graph C
• Graph D

Tags

CCSS.8.EE.B.5

At 60 seconds, how far had this object traveled? 

• 0 m
• 10 m
• 20 m
• 40 m

Tags

NGSS.MS-PS3-1

How long did it take this object to travel 10 m?

• 0 s
• 10 s
• 15 s
• 20 s