Unit3 Quiz

How is work defined?

• the amount of energy 
• the transfer of force over a distance
• rate of work in a given time
• the change in distance in a given time

If a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?

• 2 Joules
• .5 Joules
• 50 Joules
• 20 Newtons

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

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

What would have the greatest kinetic energy?

• A car driving down a hill.
• A person running down a hill. 
• A ball rolling down a hill. 
• leaves rolling down a hill 

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