Watts and Kilowatts

Presentation

•

Physics

•

9th - 12th Grade

•

Hard

Joseph Anderson

FREE Resource

8 Slides • 9 Questions

Power & Watts

Essential Questions

1. How can the conservation of energy theorem be related to work done over time?

2. How can power be calculated?

Multiple Choice

Which of these is a measure of force?

100 newtons

100 meters per second

100 joules

100 watts

Multiple Choice

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?

600 J

660 J

900 J

1200 J

Multiple Choice

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball?

77 J

7.7 J

0.7 J

770 J

Open Ended

What's your good thing for today OR what do you want to be when you're grown up?

Type response here

Multiple Choice

A steam engine does 50 J of work in 12 s. What is

the power supplied by the engine?

1.1 W

2.3 W

2.8 W

4.2 W

Multiple Choice

How long must a 350 W engine run in order to

produce 720 kJ of work? (Remember a kJ = 1000 J)

1,230 s

1,450 s

1,820 s

2,060 s

Multiple Choice

How long must a 350 W engine run in order to

produce 360 kJ of work?

681 s

804 s

1,030 s

1,440 s

Multiple Choice

A 12 kW motor runs a vehicle at a speed of 8.0 m/s.

What is the force supplied by the engine? (Remember 1 kW = 1000 W)

800 N

1000 N

1300 N

1500 N

Multiple Choice

A 24 kW motor runs a vehicle at a speed of 8 m/s.

What is the force supplied by the engine?

1,100 N

1,200 N

1,500 N

3,000 N

Power & Watts

Essential Questions

1. How can the conservation of energy theorem be related to work done over time?

2. How can power be calculated?

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