Work, Power, & Energy

In physics, we define work as this

• force x time
• force x distance
• force / time
• force / distance

In physics, power is identified as this

• force x distance
• distance / time
• work / time
• time / work

Jack pushes a lawnmower with a force of 25N and performs 250 J of work. How far did he push the mower?

• 1 meter
• 1 kilometer
• 10 meters
• none of these

A mason raises a 2,000 N bag of cement from the floor to over his head (2.0 meters) in 4 seconds. What is his average power input?

• 1,000 W
• 2,000 W
• 500 W
• 100 W

A 600 N hiker climbs a hill 100 meters high. How much work does he do?

• 60,000 J
• 32 J/s
• 600 J
• 8 W

A 200 W conveyor is used to raise boxes of cupcakes up a 10 meter building. If it takes 10 seconds to move a cake, how much do the boxes weigh?

• 20 N
• 200 N
• 2,000 N
• 2 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A boy applies a force of 100 N for a distance of 10 M, how much work does he perform?

• 1,000 J
• 100 J
• 10,000 J
• 100,000 J

Tags

NGSS.HS-PS3-1

A boy applies a force of 100 N for a distance of 10 M, how much work does he perform?

• 1,000 J
• 100 J
• 10,000 J
• 100,000 J

Tags

NGSS.HS-PS3-1

A girl pushes a sled across the snow with a force of 25 N. If she does 250 J of work, how far does she push the sled?

• 1 M
• 10 M
• 10 W
• 10 N/s

Tags

NGSS.MS-PS2-2

If you perform 1,000 J of work moving a mattress 5 M, how much does it weigh?

• 50 J
• 20 N
• 200 N
• 6 W

Tags

NGSS.HS-PS2-1