ENERGY

Two shopping carts are loose in a parking lot. One cart has lots of food in it, so it has a lot of mass. The other cart is empty. The parking lot is on a slight hill, so both carts are moving down the hill towards a parked car. They may cause a dent in the car when they hit it.

What additional information do you need to know to figure out how much kinetic energy each cart will have when they hit the parked car?

• The exact mass of each cart

• The exact distance away the car is

• THe density of each cart

• The speed (velocity) that each cart is moving

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

You're watching a movie. In the movie, two huge Big Mack trucks are speeding down the highway. One truck is driven by the bad guy, and the other truck is driven by the really, really bad guy. They are going the exact same speed! Suddenly, a train stops on the tracks right in the roadway. Both trucks are going to hit the same train car!

What additional information do you need to know to figure out which truck would hit the train with the most kinetic energy?

• the type of road surface

• the mass of each truck

• the mass of the train car

• the speed the train was traveling

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following would have the most kinetic energy?

• A huge truck driving at 30 miles per hour

• A very small car driving at 30 miles per hour

• A motorcycle driving at 100 miles per hour

• A huge truck driving at 100 miles per hour

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

There was a patch of ice on a road. Two different cars slipped on the ice and hit a tree. Luckily, no one was hurt. Car A has a mass of 800kg and was moving at 39 miles per hour. Car B has a mass of 1t500 kg and was moving at 38 miles per hour.

Which statement below best describes the energy of each car?

• Car A had more energy than Car B when it hit because it was traveling faster than Car B.

• Car A had more energy than Car B when it hit because it has a bigger mass than Car B.

• Car B had more energy than Car A when it hit because it had a much bigger mass than Car A.

• Both cars had the same energy because they were traveling approximately the same speed.

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

A person uses a bow to shoot an arrow at a target. IN which diagram does the bow and arrow have th3e greatest amount of potential energy?

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NGSS.MS-PS3-2

The roller coaster in the picture will not make it over the second hill. Pick the answer that best describes why getting over the second hill would be impossible.

• The potential energy gained when climbing the first hill is greater than the kinetic energy required to climb the second hill.

• The potential energy gained when climbing the first hill is equal to the kinetic energy required to climb the second hill.

• Energy is destroyed as the roller coaster Hill 1 Hill 2 car travels on the track

• The potential energy gained when climbing the first hill is less than the kinetic energy required to climb the second hill.

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Propeller on a toy airplane is turned twenty times, which twists the rubber band connected to it. When the propeller is released, the rubber band unwinds and the propeller turns a high speed, enabling the airplane to fly.

What type of energy is stores in the rubber band?

• Mechanical

• Elastic Potential

• Electrical

• Gravitational Potential

Propeller on a toy airplane is turned twenty times, which twists the rubber band connected to it. When the propeller is released, the rubber band unwinds and the propeller turns a high speed, enabling the airplane to fly.

What type of energy results when the rubber band unwinds and the propeller turns, allowing the plane to fly?

• Mechanical

• Elastic potential

• Electrical

• Chemical

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A bowling ball is rolled down a bowling alley towards some pins. If you wanted to make the bowling ball hit the pins with more kinetic energy, what could you change?

• Use a bowling ball with a bigger mass

• Make the bowling alley longer

• Decrease the speed of the bowling ball

• Set the bowling pins closer together

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Two marbles that both have a mass of 10 grams are dropped to the ground. The green marble is dropped from 1 meter high and the blue marble is dropped from 2 meters high.

Which statement below best describes the amount of energy when each marble hits the ground?

• They will have the same amount of energy as they hit because they are the same mass.

• The green marble will have more energy because it was dropped when it was closer to the ground

• The blue marble will have more energy because it has more gravitational potential energy

• None of the above are accurate

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NGSS.MS-PS3-2

NGSS.MS-PS3-5