Work, Energy, Power

What is kinetic energy?

• stored energy
• energy of motion
• energy of friction
• energy stored in chemical bonds

What type of energy represents the sum of the KE and PE that a moving object has?

• chemical energy
• total mechanical energy
• electromagnetic energy
• electrical energy

What has to happen when a force is exerted on an object for work to be done?

• the object moves
• the object stays still
• the object is heavy
• none of these

When a roller coaster cart falls towards the ground, what happens to its potential energy?

• Increases
• Decreases
• Stays the same
• Nothing

When a rollercoaster cart moves towards the ground, what happens to the PE that it has?

• It transforms into KE
• It leaves the system
• Nothing
• It stays PE

What is the kinetic energy of a ball sitting on top of a hill?

• 0 J
• less than 0 J
• more than 0 J

What is being transferred as you do work?

• Energy
• Heat
• Power
• Gravitational Potential Energy

How do we calculate work?

• W = F * d
• w = f * D
• W = F * D
• w = f * d

How do you calculate power?

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

The SI unit of work is?

• Joules
• Watts
• Newtons
• meters