Work, Power, Energy

How is power defined?

• transfer a force through a distance
• the rate of speed 
• the rate of work being done
• transfer of space over time

What is the equation for power?

• P = Work/time
• P = Force/time
• P = time/distance
• P = Work * time

True or False: Power can be increased by doing more work.

• True
• False

What is the unit of measurement for Power?

• Joules
• Newtons
• Watts
• Meters

What is the unit of measurement for Work?

• Joules
• Newtons
• Watts
• Meters

Tags

NGSS.HS-PS2-1

If a crane lifts a small car 15 meters using 25,000 joules of work in 5 seconds, how much power was generated by the crane?

• 5, 000 Watts
• 1,667 Watts
• 75 Watts
• 375,000 Watts

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

If an MMA fighter uses 40 Newtons of force to punch a bag 0.5 meters in 2 seconds, how much power was created? Hint: W = Force * distance

• 10 Watts
• 1 Watts
• 20 Watts
• 40 Watts

If a man holds a 50 kg ball 0.75 meters high with a force of 10 newtons for 10 seconds. How much power is generated?

• 1 Watt
• None
• 37.5 Watts

In which scenario is more power being generated?

• Man throws ball with 20 N force 3 m in 10 seconds
• Man throws ball with 20 N Force 5 meters in 10 seconds

A large slingshot uses 100 newtons of force to pull a bowling ball 3 meters in 2 seconds, how much power was generated?

• 150 watts
• 1.5 watts
• 6 watts
• 300 wats

Tags

NGSS.HS-PS3-1