Energy

Daily Review - What is the potential energy of a 25 kg backpack sitting on a 0.8 m high table?

PE = mgh

What is the kinetic energy of a 44 kg cheetah running at 31 m/s?

KE = ½ mv²

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

The statement that "the energy within a system remains constant and cannot be created or destroyed, only transformed" best sums up _________.

• Something Mr. Lance likes to say.

• Life

• Law of Conservation of Energy

• The scientific method

• Newton's Third Law

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. 

What is kinetic energy?

• energy of work
• energy of motion
• energy of gravity
• energy of power

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

Can energy be destroyed?

• no
• yes

Can energy be changed?

• yes
• no