Unit 7 Review: Work, Power, Energy

Which of the following IS NOT an example of work being done?

• Pushing a cart in a store
• Shooting a basketball
• A stand off in tug of war
• Running a mile

If a boulder is lifted by a forklift a distance of 10 meters with a force of 30 Newtons. How much work is being done?

• .333 Joules
• 3 Joules
• 300 Joules
• 60 Joules

Tags

NGSS.MS-PS3-5

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

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

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

A rabbit of mass 3kg walks at a speed of 0.5m/s. Calculate its kinetic energy.

• 0.5 J
• 0.75 J
• 0.255 J
• 0.375 J

When a pendulum swings, at which point is kinetic energy highest: 

• 1
• 2
• 3
• 4

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

• 250,000 J

• 2,450,000 J

• 2,451,663 J

• 248 J

A 250 kg island is floating 20 meters in the air. How much potential energy does the island have?

• 49,000 J

• 5,000 J

• 0.98 J

• 509.68 J