Physics Equations AQA 9-1

Question 1

What equation links power, work done and time?

Answer 1

Power = work done / time

P = W/t
P = Power (W)
W = work done (J)
t = time (s)

Question 2

What is the equation to work out kinetic energy?

Answer 2

Kinetic Energy = 1/2 mass (speed)2

KE = 1/2 m v^2

KE = kinetic energy (J)
m = mass (kg)
v = velocity (m/s)

Question 3

What is the equation for gravitational potential energy?

Answer 3

GE = m g h

Gravitational potential energy = mass x gravitational field strength x height

GE = gravitational potential energy  (J)
m = mass (kg)
g = gravitational field strength (J/kgm)
h = height (m)