Equations

Question 1

What’s the equation for acceleration

Answer 1

A=v-u/t

acceleration = final velocity (m/s) - initial velocity (m/s) / time

Question 2

What is the equation for force

Answer 2

F = m x a

Force (in newtons, N) = mass (in kg) x acceleration (m/s)

Question 3

What is the equation for weight

Answer 3

W = m x g

Weight ( in newtons, N) = mass (kg) x gravitational field strength (in N/kg)

Question 4

what is the equation for GPE

Answer 4

GPE = m x g x h

Gravitational potential energy = mass (kg) x gravity x height (meters)

Question 5

What is the equation for kinetic energy

Answer 5

KE = 0.5 x m x v2

Kinetic energy = half x mass (kg) x velocity squared (m/s)

Question 6

What is the equation for momentum

Answer 6

P = m x v

Momentum (kg m/s) = mass (kg) x velocity (m/s)

Question 7

What is the equation for efficiency

Answer 7

Efficiency = useful energy out / total energy in

Question 8

What is the equation for wave velocity using frequency (f)

Answer 8

V = f x λ

Wave velocity (m/s) = frequency (Hz) x wave length (m)

Question 9

What is the equation for wave velocity using distance (x)

Answer 9

V = x / t

Wave velocity (m/s) = distance (m) / time (s)