Work and Power

Work requires force and _______.

• time

• position

• distance

• velocity

Tags

NGSS.HS-PS2-1

Work/Time = ________?

• speed

• force

• velocity

• power

Which of the following is the best example of work being done.

• doing homework

• lifting a box

• pushing a stationary box

• holding a box

What is the definition of power?

• the amount of work an object does

• the rate at which force is applied

• the amount of matter in an object

• the rate at which work is done

Nest pushes a basketball with a force of 32 Newtons. In 4 seconds, he moves the ball 12 meters. How much power did Nest demonstrate?

• 32 Watts

• 96 Watts

• 10.67 Watts

• 1536 Watts

What is the unit of measurement for power?

• newtons

• joules

• watts

• meters

How much work is being done with 200 N of force over 426 meters?

• 85,200 J

• 45,620 J

• 90,480 J

• 62,329 J

Work is measured in which units?

• Newtons

• Joules

• Watts

• Joule/sec

Tags

NGSS.HS-PS2-1

Two people are lifting the same weight as shown in the animation. If they both do 10 reps, who will do the most work?

• Bro A

• Bro B

• They both will do the same work

• Can't tell without knowing the weight they are lifting

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?

• 600 J

• 660 J

• 900 J

• 1200 J