Work, Energy, and Heat

Question 1

can be defined as the ability to do work.

Answer 1

Energy

Question 1

Measured in

Answer 1

Joules
Or Newton meter

Question 2

• is stored energy

Answer 2

Potential Energy

Question 3

• is the energy in motion.

Answer 3

Kinetic Energy

Question 4

Potential Energy Formula:

Answer 4

PE = mgh
mass- kg
gravity - m/s2
height - m

PE = kg m 2/ s2
or Joule

Question 5

Kinetic Energy Formula:

Answer 5

KE = mv2/2
mass- kg
velocity - m/s (2)

KE = kg m 2/ s2
or Joule

Question 6

The Law of Conservation of Energy 4 laws

Answer 6

1. The energy of a system is constant.
2. Energy cannot be created nor destroyed.
3. Energy can only change form
4. True for any system with no external forces.

Question 7

The Law of Conservation of Energy Formulas:

Answer 7

ET = KE + PE = Constant
Where:
ET = Mechanical Energy

KE = Kinetic Energy
PE = Potential Energy

KEinitial + PEinitial = KEfinal + PEfinal

Question 8

-Is an energy in transit.
-”lost energy”

Answer 8

Thermal Energy / Heat

Question 9

Thermo means HEAT
Dynamic means MOTION

Answer 9

THERMODYNAMICS
2nd Law

Question 10

• Heat always moves from a warmer place to a cooler place.
• Hot objects in a cooler room will cool to room temperature.
• Cold objects in a warmer room will heat up to room temperature.

Answer 10

HEAT TRANSFER