Physics Work Energy Power

Mike and Ian move 50 m on a snow lift which uses 750 N of force to move them in 75 seconds. Calculate the power of the lift.

• 750 W

• 500 W

• 7500 W

• 2812500 W

Ian and Steve ski down the 75 m slope in 80 seconds using 400 N of penguin force. Calculate their penguin power!

• 375 W

• 37.5 W

• 426.7 W

• 240 000W

Tags

NGSS.MS-PS2-2

Mike and Peter are climbing to the top. Both take the same time, do the same route, but Mike has a mass of 25 kg while Peter has a mass of 30 kg. (He is a bit taller). Which penguin does the most work and why.

• Mike as shorter people have shorter legs and does more work.

• Peter as he does more work over the same time than Mike because he has a bigger weight force

• Mike and Peter do the same amount of work as they do the same route in the same time.

• Peter as he does the same amount of work but in a smaller amount of time.

Tags

NGSS.MS-PS2-4

If you push as hard you can on an object, what are you putting onto it?

• distance

• work

• force

• time

Tags

NGSS.MS-PS2-2

A roller coaster goes over a 10m high hill at 20m/s. What kind of energy does the roller coaster have?

• Potential

• Kinetic

• Both

• Neither

Which is a valid set of units for energy

• kgN

• Nm²/s²

• w

• kgm²/s²

Tags

NGSS.MS-PS3-4

2 identical bowling balls are dropped from the side of a cliff. Bowling ball B is dropped from twice as high than bowling ball A. How many times more kinetic energy does bowling ball B have?

• 2

• Square Root (2)

• Same amount

• 1/2

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

You are playing kickball in gym. You kick the 0.5kg ball with enough force to cause it to travel at 4m/s. How much energy would the ball have at the peak of its movements?

• 19.6J

• 2J

• 4J

• 0.8J

Tags

NGSS.MS-PS3-1

You 80kg and your date 65kg decide to go to the park. The two of you decide to see who can get the highest on the swings. At the bottom of your swing you are 1m above the ground and are traveling 5m/s. How high is your peak in the swing?

• 2.28m

• 1.28m

• 1m

• 9.8m

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Energy is ....

• Weird

• Destroyed during explosions

• Conserved

• Created under the right circumstances

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5