Power, Mechanical Advantage, Forms of energy quiz

What type of energy allows you to see the images and texts on your cell phone screen?

• Sound

• Thermal

• Light

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Which type of energy is represented in the image?

• Sound

• Mechanical

• Electrical

A music amplifier is intended to convert ______________ energy into sound energy.

• light

• mechanical

• electrical

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Is this a heat, light, or sound source?

• Sound
• Light
• Heat

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What type of energy causes ice cream to melt?

• thermal/heat

• light

• sound

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What types of energy does the toy oven use to bake the cakes?

• Light and sound

• Electrical and thermal

• Mechanical and electrical

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What tool can be used to measure thermal energy?

• balance

• thermometer

• scale

The formula for kinetic energy is

• KE = 1/2mv²

• W= Fd

• P = W/t

Tags

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While rowing across the lake during a race, John does 3960 J of work on the oars in 60 seconds. What is his power output in Watts?

Formula ( P= W/t)

• 56W

• 100W

• 66W

Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?

(a)