Power (Overview)

What is the formula for calculating the total amount of mechanical energy?

• ME = KE + PE
• KE = ME + PE
• PE = KE + ME
• ME = 1/2 mv²

Energy from a compressed spring would be an example of...

• kinetic
• elastic
• gravitational
• chemical

What is mechanical energy?

• It is what metal creates when heated.
• All potential and kinetic energy in a system.
• It is motion of all matter.
• Energy of momentum.

How do you calculate power?

• P = W/t
• P = E/t
• P = w * t
• P = bbq/chicken

What is the formula for Kinetic Energy?

• PE = m*g*h
• KE = 1/2m*v2
• W = F*d
• P = W/t

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

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

When you release a stretched rubber band, the rubber band has ________ energy. 

• kinetic 
• potential
• none of the above
• all of the above 

Energy of a rock perched on a cliff is an example of...

• gravitational
• elastic
• chemical
• kinetic

The SI Unit for Energy is

• Joule

• Newton

• Calorie

• Watt

Suppose a cart has a kinetic energy of 0.5 J. If you add enough mass to double the mass and make the cart go three times as fast, its kinetic energy is now ---.

• 6 J

• 3 J

• 18 J

• 9 J