Physics formula

Question 1

Gravitational potential energy

Answer 1

GPE = mgh which is mass(kg) times gravitational field strength (N/kg) times height (metres). GPE is measured in joules.

Question 2

Kinetic energy

Answer 2

KE = 1/2 mv^2

Question 3

Work done

Answer 3

W = F x d

Question 4

Power

Answer 4

P = W/t

Question 5

Newton’s laws of motion

Answer 5

1. An object will remain stationery or continue to move in a straight line at a constant speed unless it is acted upon by an external force 2. The resultant force is the single force that can replace all the others and have the same effect on the object. (F = m x a) 3. Whenever two objects interact, the force they exert on each other is equal and opposite

Question 6

Terminal velocity explained

Answer 6

As objects get faster and faster, air resistance gets bigger and bigger, eventually they become equal, and the object moves at a constant speed (terminal velocity)

Question 7

Resistance

Answer 7

R = V/I Voltage/Current

Question 8

Current

Answer 8

I = Q/t charge flow/time taken

Question 9

Measurements for circuits

Answer 9

Resistance - ohms, current- amperes, charge flow- coulombs, voltage- volts

Question 10

Voltage (or potential difference)

Answer 10

V = E/Q, energy over charge

Question 11

Relationship between current and voltage

Answer 11

directly proportional

Question 12

Relationship between current and resistance

Answer 12

inversely proportional

Question 13

Moment

Answer 13

M = Fd