# Chapter 1 Flashcards

What are the 7 stores of energy

Kinetic Thermal Elastic potential Gravitational potential Chemical Magnetic Electrostatic

What are the 4 energy transfers?

Mechanical working

Electrical working

Heating by particles

Hearing by radiation

What is the symbol and word equation for work done?

Work done = force x distance

W = F x S

(J) = (N) x (S)

What’s the symbol and word equation for elastic potential?

Energy = 1/2 spring constant x extension^2 Ee = 1/2 k x e^2 (J) = (N/m) x (m)

What is the symbol and word equation for weight?

Weight = mass x gravitational field strength W = m x g (N) = (kg) x (N/kg)

What is the symbol and word equation for kinetic energy?

Energy (kinetic) = 1/2 mass x velocity^2

Ek = 1/2 m x v^2

(J) = (kg) x (m/s)

What is the symbol and word equation for gravitational potential energy?

Energy (gravitational) = weight x height

Eg = mg x h

(J) = (kg)(N/kg) x (m)

What is the word and symbol equation for power?

Power = energy / time P = E / T (W) = (J) x (S)

What is the word equation for efficiency?

Efficiency = useful output / total input

What are the prefixes?

kJ MJ mJ

kJ= 1000 J MJ= 1000 000 J mJ= 0.001 J

What is the principal of conservation of energy?

Energy cannot be created or destroyed

*only transferred from one store to another*