Work and energy

A student turns on flashlight. What is the energy conversion that happened?

• chemical - light - electrical

• electrical - chemical - light

• chemical - electrical - light

• light - chemical - electrical

Calculate the KE of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s

• 5120 J
• 320 J
• 640 J
• 2560 J

____________ is the ability to cause change. 

• Energy 
• Force 
• Friction
• Motion

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

When you stretch a rubber band, you are storing __________ energy. 

• gravitational potential
• elastic potential
• kinetic 
• none of the above 

Energy can not be created or destroyed, only converted from one form to another.

• true
• false

At which point is potential energy greatest?

• W
• X
• Y
• Z

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase