Understanding Check: Work and Power

Arjun pushes a box across the floor with a constant force. Which of the following best defines the "work" Arjun does in physics?

• The amount of energy stored in the box

• The product of force and the distance moved in the direction of the force

• The rate at which energy is transferred

• The force applied to the box at rest

Benjamin is measuring the rate at which his new blender uses energy while making a smoothie. What is the SI unit of power that Benjamin should use to record this measurement?

• Joule

• Watt

• Newton

• Meter

Scarlett pushes a box with a constant force in the direction it moves. Which of the following is the correct formula to calculate the work done by Scarlett?

Tags

NGSS.MS-PS3-5

Tags

NGSS.MS-PS3-5

Emma lifts a box onto a shelf and wants to understand the difference between work and power. Which of the following statements correctly compares work and power?

• Work is the rate at which power is done.

• Power is the rate at which work is done.

• Work and power are measured in the same units.

• Power is always greater than work.

Tags

NGSS.MS-PS3-5

• 200 W
• 20 W
• 2 W

• 0 W

Tags

NGSS.HS-PS3-2

• Both have the same power output

Match the following scenarios with the correct power output of the motor.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4