Work, Energy, Power

A 3.0 kg ball is on a table 1.5 m above the ground. What is its gravitational potential energy?

• 4.5 J

• 44.1 J

• 3.4 J

• 29.4 J

Tags

NGSS.MS-PS3-2

What is the kinetic energy of a 12 kg dog running at 3 m/s?

• 36 J

• 353 J

• 54 J

• 118 J

Tags

NGSS.MS-PS3-1

How much energy is used by a 100 W light bulb over 1 hour? (be sure to convert to seconds first)

• 100 J

• 36,000 J

• 360,000 J

• 240,000 J

Tags

NGSS.MS-PS3-5

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?

• Bobby

• Carol

• They did the same amount of work

• Not enough information

Tags

NGSS.MS-PS3-2

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who used more power?

• Bobby

• Carol

• They did the same amount of work

• Not enough information

A 0.300 kg orange falls off a 1.2 m high table. How much kinetic energy does the orange have when it reaches the ground?

• 3.5 J

• 0.22 J

• 0.40 J

• 4.6 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A pendulum has 10 J of gravitational potential energy at its highest point. How much kinetic energy does it have at its lowest point?

• 0 J

• 2 J

• 5 J

• 10 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

At one point, a falling apple has 2 J of gravitational potential energy and 7 J of kinetic energy. How much kinetic energy does it have when it hits the ground?

• 2 J

• 7 J

• 9 J

• 5 J

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

A solar panel is connected to a lamp. Does the panel do positive or negative work on the lamp?

• positive

• negative

• not enough information

A horse pulls a cart from rest to 3 m/s. Does the horse do positive or negative work on the cart?

• positive

• negative

• not enough information

Tags

NGSS.MS-PS3-5