Energy and Forces

Gravity can be defined as the –

• force of attraction between two or more masses.

• friction created when two objects are in contact.

• energy given off by stars due to nuclear reactions.

• path an object follows as it moves through space.

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NGSS.MS-ESS1-2

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Which of the following answer choices is NOT an example of potential energy?

• Running down a steep hill on vacation

• Holding a basketball in practice

• A drawn bow in an archer's hand

• A baseball at its highest point in the air

Tags

NGSS.MS-PS3-2

Food, fuels and batteries have energy in this energy store

• Chemical

• Thermal

• Gravitational Potential

• Elastic

Which kind of energy change occurs when a candle is burning?

• Chemical to light.

• Light to electrical.

• Solar to heat.

• Chemical to electrical.

Energy transformations occur when...

• energy is created through conduction

• energy changes from one form to another

• two forces slide together that are touching

• a chemical reaction takes place

Tags

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Which of the following devices transforms electrical energy into kinetic energy?

• An e-reader

• a fan

• a manual pencil sharpener

• ipod

Tags

NGSS.MS-PS3-5

At which point is potential energy greatest?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

What energy conversion happens when a roller coaster car moves DOWN a hill?

• Kinetic energy is converted to potential energy.

• Potential energy is converted to kinetic energy.

• Friction energy slows it down.

• Thermal energy is converted to solar energy.

Tags

NGSS.MS-PS3-2

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In order for an object moving at 10 m/s to have a kinetic energy of 1200 Joules, the object must have a mass in the range of _________________.

• 0-10 kg

• 10-20 kg

• 20-30 kg

• 30-40 kg

Tags

NGSS.MS-PS3-1

The faster an object moves, the ________ kinetic energy it has. 

• more

• less

• none of the above

• same

Tags

NGSS.MS-PS3-1