Energy

Question 1

What is Energy?

Answer 1

quantity that must be transferred to perform work or to heat a body

Question 2

What is the difference between “energy” and “potential energy”?

Answer 2

“Energy” is a direct representation of what is the current state of a body

“Potential Energy” is a way to describe the possible useful work that can be performed as energy “stored” in an object can be released later

Question 3

What is the Conservation of energy?

Answer 3

energy can NEVER be created or destroyed, it is ONLY able to be transformed between objects

some energy is dissipated in the form of heat, sound, light and mechanical changes

Question 4

What is energy efficiency?

Answer 4

Efficiency = Eoutput/ Einput

Question 5

What is kinetic energy?

Answer 5

The energy of an object by virtue of its motion
Ek = 1/2mv2

Question 6

What is gravitational potential energy?

Answer 6

the potential energy available to an object due to gravity
Egp = mgh

Question 7

What is the equation of work?

Answer 7

W = Fd

Question 8

What is the equation for energy power?

Answer 8

P = Efinal - Einitial / time