P1 - conservation of energy

Question 1

What are the seven states of energy

Answer 1

Kinetic, thermal, elastic potential, gravitational potential, chemical, magnetic, electrostatic

Question 2

What are the 4 transfers of energy

Answer 2

Mechanical, electrical, heating by particles, heating by radiation

Question 3

What is the law of conservation of energy

Answer 3

Energy cannot be created or destroyed

Question 4

Word equation for weight with units

Answer 4

Weight (N) = mass (kg) x gravity (N/kg)

Question 5

Word equation for gravitational potential energy

Answer 5

Gravitational potential energy = mass x gravity x height

Question 6

Symbol equation for gravitational potential energy

Answer 6

Eg = mgh

Question 7

Word equation for kinetic energy

Answer 7

Kinetic energy = 1/2 x mass x velocity^2

Question 8

Symbol equation for kinetic energy

Answer 8

Ek = 1/2mv2

Question 9

Formula for velocity

Answer 9

Velocity = distance/time

Question 10

Formula for work done

Answer 10

Work = force x distance

Question 11

Word equation for elastic potential energy

Answer 11

Elastic potential energy = 1/2 x spring constant x extension ^2

Question 12

Symbol equation for elastic potential energy

Answer 12

Ee = 1/2ke2

Question 13

Equation for effeciency

Answer 13

Efficiency = useful output / total input x 100