Work and Energy Review

If your teacher falls down these stairs, what would happen to his potential energy?

• Increase

• Decrease

• Remain constant

Tags

NGSS.HS-PS3-1

Which formula should you use to calculate work?

• W = m·g

• W = m + g

• W = F·d

• W = F + d

A plastic marble rolls along this rollercoaster ramp without friction or air drag. Where will it have the most potential energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Four toy cars of equal mass are rolling on the floor. Their velocities are listed below. Which has the most potential energy?

• The one moving at 4 m/s backward

• The one moving at 2 m/s backward

• The one moving at 3 m/s forward

• The one moving at 1 m/s forward

• all the same

Tags

NGSS.MS-PS3-2

How much kinetic energy does a 0.2kg mouse-trap car have when it is rolling at 4 m/s?

• 0.08 J

• 0.4 J

• 1.6 J

• 3.2 J

• 8 J

Tags

NGSS.HS-PS3-1

If the mouse-trap car from the previous question was rolling twice as fast, which statement would be true?

• It would have 2× times as much potential energy

• It would have 2× as much kinetic energy

• It would have 4× as much potential energy

• It would have 4× as much kinetic energy

Tags

NGSS.HS-PS3-2

This table is 400 cm long, 160 cm wide and 80 cm tall. How much potential energy does the 1kg microscope have?

• 0.8 J

• 4 J

• 8 J

• 40 J

• 80 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

This graph describes the motion of a 60 kg dog. Calculate its kinetic energy.

• 1,800 J

• 27,000 J

• 54,000 J

• 432,000 J

• 864,000 J

Tags

NGSS.HS-PS3-1

A man pushes this 50ºF box 5 meters across the floor. He does this by applying 20 N for 4 seconds. How much work did he do?

• 16 J

• 25 J

• 80 J

• 100 J

• 125 J

Tags

NGSS.HS-PS2-1

A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?

• 2000 Joules
• 19,600 Joules
• 19,600 m/s
• 31.3 m/s

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS2-4