Work, Power, & Energy

Select all: Work is equal to...

• KE + PE

• Change in energy

• mg

• Fd

Tags

NGSS.MS-PS3-5

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?

• Bobby

• Carol

• They did the same amount of work

• Not enough information

Tags

NGSS.MS-PS3-2

A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:

• 320 W

• 400 W

• 500 W

• 2 000 W

Is the amount of energy being transferred over a period of time.

• Power

• Energy

• Seconds

• Joules

What is the unit of measurement for power?

• Joules

• Watts

• Voltage

• Calories

Which type of appliances transfer the most energy per second?

• Those that transfer energy into heat.

• Those that transfer energy into light.

• Those that transfer energy into sound.

• Those that transfer energy into movement.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

A kettle transfers 1000J of energy every 2 seconds. Calculate its power.

• 2000 Watts

• 1000 Watts

• 500 Watts

• cannot be determined

Where does the pendulum have the greatest potential energy? (pick 2)

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS3-2

Where does the pendulum stop moving for just a split second so that it's kinetic energy is zero? (pick 2)

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is included in mechanical energy?

• Potential Energy

• Kinetic Energy

• Potential and Kinetic Energy

• None of the options