Work, Energy, Power

A soccer player makes a pendulum with her leg as she shoots. At which point would she have to make contact with the ball in order to have the MOST kinetic energy?

• C because half the potential energy would be converted to kinetic energy

• D because half the potential energy would be converted to kinetic energy

• C because all the potential energy would be converted to kinetic energy

• D because all the potential energy would be converted to kinetic energy

The kinetic energy of this shot at point A is 92 J. What is it's potential energy at point B, when the kinetic energy is 98 J?

• 60 J

• 120 J

• 6 J

• 12 J

Tags

NGSS.HS-PS3-2

Calculate the gravitational potential energy at point F for a 560 kg rollercoaster cart travelling 33 m/s at a height of 13 m.

• 5,488 J

• 9,240 J

• 71,344 J

• 304,920 J

Calculate the kinetic energy at point F for a 560 kg rollercoaster cart travelling 33 m/s at a height of 13 m.

• 5,488 J

• 9,240 J

• 71,344 J

• 304,920 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball?

• 567 J

• 900 J

• 945 J

• 30 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Calculate the work needed to travel from A to F for a 560 kg rollercoaster cart initially travelling 12 m/s at a height of 22 m at point A. Its speed at point F is 33 m/s and it is 13 m high.

• 40,320 J

• 304,920 J

• 345,240 J

• 264,600 J

Tags

NGSS.HS-PS3-1

Four soccer players each take a penalty kick from 11 m away from the goal. The force they produce and the time it took the ball to cross the goal line were recorded. Which player had the greatest power output?

• A

• B

• C

• D

A stray cat ran through your yard. The cat has a mass of 5 kg. She is running at a speed of 3 m/s. What is the kinetic energy of the cat as she runs?

• 8.5 J

• 45 J

• 7.5 J

• 22.5 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

What is the maximum height a ball could roll to if it was started from point C? Assume mechanical, frictional, and air resistances are included.

• D

• E

• F

• G

Tags

NGSS.HS-PS3-1

Calculate the speed at which a 1200 kg car would need to travel in order to produce 2,160,000 J of energy.

• 30.3 m/s

• 60 m/s

• 42.4 m/s

• 1,800 m/s

Tags

NGSS.HS-PS3-1