Velocity-time graph

Which section of the graph shows decreasing velocity?

• CD
• DE
• EF
• GH

Which section of the graph shows increasing velocity?

• AB
• BC
• DE
• EF

Which section of the graph shows constant velocity?

• AB
• BC
• EF
• GH

Which line shows the fastest velocity? (choose all that apply)

• Line A

• Line B

• Line C

• Line D

• None of them

For the graph of the story : a student is walking home from school and stops to talk to a friend. While talking, he realizes that he forgot his bike at school and goes back to get it. He then rides his bike home. Which part matches up with Line segment A?

• Walking home from school

• Stops to talk to a friend

• Goes back to school

• Rides his bike home

• None of them

Between which time intervals does the object speed up/increase velocity?(velocity moves away from 0 m/s point)

• 0-10 sec and 40-55 sec

• 15-30 sec and 40-55 sec

• 0-10 sec and 30-40 sec

• 15-30 sec and 30-40 sec

Between which time intervals does the object slow down/decrease velocity?(velocity move towards 0 m/s point)

• 0-10 sec and 40-55 sec

• 15-30 sec and 40-55 sec

• 0-10 sec and 30-40 sec

• 15-30 sec and 30-40 sec

Is the speed constant or non-constant?

• constant
• non-constant

What is happening at 0 m/min in the middle of segment C - D?

• Nothing is happening

• Change in speed

• Change in position

• Change in direction

Part D of the graph is from 55s to 95s. During Part D, the velocity values are all negative. What does negative velocity mean?

• The object is slowing down.

• The object is moving in the opposite direction now.