Quick Review of Energy

What are the two types of Mechanical Energy? (ME)

• Kinetic and Potential Energy
• Kinetic and Nuclear Energy
• Potential and Chemical Energy
• Thermal and Kinetic Energy

Kinetic Energy is defined as

• Energy stored due to its location
• Energy of motion
• Energy stored in the bonds of molecules
• Heat energy

The equation to find kinetic energy is

• KE=1/2mv²
• KE=mgh
• KE=1/2kx²
• KE=Fd

the equation for gravitational potential energy is 

• PE_g = mgh
• PE_g= 1/2kx²
• PE_g= Fd
• PE_g = 1/2mv²

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?

• Potential Energy
• Kinetic Energy
• Nuclear Energy
• Chemical Energy

elastic potential energy is defined as

• the energy an object has due to its height above the ground

• the energy an object has due to its motion

• the energy a spring has due to its stretch

• the chemical energy stored in the molecules of atoms

the equation for elastic(spring) potential energy is

• PE_s = mgh

• PE_s= 1/2kx²

• PE_s= Fd

• PE_s = 1/2mv²

Power is:

• Work

• Work x time

• Work / time

• Kinetic energy

As the amount of work a person does increases in the same amount of time the person...

• delivers more power
• delivers less power
• delivers the same amount of power 
• power rating can not be determined

As the weight lifter picks up a very heavy barbell. When he is lifting the barbell...

• He does no work
• He does positive work
• He does negative work