PS3.3 Kinetic Energy (Mass and Speed)

A ball weighs around 1kg and it traveling at 20 meters per second. What is the kinetic energy of the ball?

Tags

NGSS.MS-PS3-1

A beach ball and a bowling ball were sitting on a shelf. Someone bumped the shelf and the bowling ball and beach ball rolled off the shelf at the same time. They both hit the ground at the same time and had the same speed. Which of these statements correctly compares the kinetic energy of the two objects just before they hot the ground?

• The bowling ball had more kinetic energy because it had less potential energy when it was on the shelf.

• The bowling ball had more kinetic energy because it has more mass.

• Both balls had the same kinetic energy because they had the same speed.

• Both balls had the same kinetic energy because they had the same potential energy when they were on the shelf.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Car A has a mass of 1500kg and is moving at 89 miles per hour. Car B has a mass of 1501kg and is moving at 28 miles per hour. Which statement below best describes the kinetic energy of each car?

• Car A has more energy than Car B because it is traveling faster than Car B.

• Car A has more energy than Car B because it has a smaller mass than Car B.

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

• Both cars have the same energy because they have about the same mass.

Tags

NGSS.MS-PS3-1

A small sedan is driving at 12 m/s. It has a mass of 2,000kg. Calculate the kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Students record the mass, speed, and kinetic energy of objects moving along a track. The students create these data tables. Which two statements correctly relate the mass and speed of an object to its kinetic energy?

• When an object's speed doubles, its kinetic energy doubles.

• When an object's speed doubles, its kinetic energy more than doubles.

• When the mass of an object doubles, its kinetic energy doubles.

• When the mass of an object doubles, its kinetic energy more than doubles.

• When both the speed and the mass of an object double, its kinetic energy doubles.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A 30kg dog runs at a speed of 15m/s. What is the kinetic energy of the dog?

Tags

NGSS.MS-PS3-1

Mr. Toth and his 5 year old son are both sitting on skateboards at the top of a hill. If they both lift their feet and start rolling, who has more kinetic energy?

• They both have the same kinetic energy.

• Neither one has any kinetic energy.

• Mr. Toth has more kinetic energy.

• Mr. Toth's son has more kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A 6,200kg African elephant charges at a speed of 10m/s. What is the elephant's kinetic energy?

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which ball would have the least kinetic energy when dropped?

• 100kg ball

• 50kg ball

• both balls would have the same amount of kinetic energy

• both balls would have the same gravitational potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Guinea pig A has a mass of 2kg guinea pig runs at a speed of 2m/s. Guinea pig B has a mass of 4kg and runs at 1m/s. Find the kinetic energy of each guinea pig to determine which guinea pig has more kinetic energy.

• Guinea pig A has more kinetic energy because it is running faster than Guinea pig B.

• Guinea pig B has more kinetic energy because it has more mass than guinea pig A.

• They both have the same kinetic energy even though they have different masses and speeds.

• You do not have enough information to find their kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5