Exam on Potential Energy, Kinetic Energy, Gravitational Energy, Work and Power

At which point is potential energy greatest?

• W

• X

• Y

• Z

A 60 kg person walks to the roof of a 80 m tall building. What is their gravitational potential energy is there? (Take g = 10 m/s²)

PE = mgh

• 600 N

• 4800 J

• 8000 J

• 48,000 J

Tags

NGSS.HS-PS2-4

A pitcher throws a 0.145 kg baseball at a velocity of 30.00 m/s. How much kinetic energy does the ball have? KE = 1/2mv²

• 65.85 J

• 87.25 J

• 23.45 J

• 65.25 J

Tags

NGSS.HS-PS3-1

Two objects with different masses are placed on the same shelf. Which object contains more potential energy?

• The object with a greater mass has more potential energy.

• The object with less mass has more potential energy.

• Both objects have the same amount of potential energy.

• Neither object has any potential energy because they are not moving

Tags

NGSS.MS-PS3-2

How high must a 20kg box be lifted to give it 784 J of potential energy?

PE = mgh

h = PE/mg

• 3.98 km

• 392 m

• 3.92 m

• 3 m

Which point has the most kinetic energy, assuming friction and air resistance are negligible?

• A

• B

• c

• D

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

When a pendulum swings, at which point is gravitational potential energy at its greatest?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

When a pendulum swings, at which point is there the most kinetic energy?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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

• more

• less

• none of the above

• all of the above

Tags

NGSS.HS-PS3-2

The two factors that determine kinetic energy are ____________________________ & ____________________________.

• mass and height

• height and gravity

• gravity and velocity

• mass and velocity