Unit 2 Lesson 1 Work, Energy, and Power

Which of the following describes a transfer of energy through work?

• A student carries a heavy backpack one km.

• A laboratory burner is used to heat 250 mL of water to boiling.

• A woman pushes a luggage cart in an airport over a distance of 100 m.

• A man pushes on a large piece of furniture for 15 min, but it does not move.

Tags

NGSS.MS-PS3-5

The table shows different forces and distances that employees in a factory used to lift boxes.

Which employee did the most work while lifting boxes?

• Cassie

• Rafael

• Ayanna

• Michael

Which of the following is an example of energy being used to do work?

• A woman sits on the edge of a bench.

• A soccer ball rests at the top of a hill.

• A boy holds a fishing pole over the water.

• DA girl climbs up a ladder holding a paint can.

Tags

NGSS.MS-PS3-5

A lightbulb uses 2,000 J of energy in 1 min and 20 s. What is the power of the lightbulb?

• 25 W

• 50 W

• 60 W

• 100 W

Which of the following best defines energy?

• the ability to do work

• the resistance to motion

• how fast an object moves

• amount of force in a given time

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5