Calculating Equations A1

Question 1

Equation for weight

Answer 1

Weight = mass x gravitational field strength. 
W = m x g

Question 2

Equation for work done

Answer 2

Work done = force x distance

W = f x s

Question 3

Equation for force applied to a spring

Answer 3

Spring constant x extension

F = k x e

Question 4

Equation form movement of a force

Answer 4

Force x distance

M = f x d

Question 5

Equation for pressure

Answer 5

Pressure = force normal to a surface / area of that surface 
M = f / a

Question 6

Equation for distance travelled

Answer 6

Distance travelled = speed x time

D = s x t

Question 7

Equation for acceleration

Answer 7

Acceleration = change in velocity/ time taken 
A = 🔺v / t

Question 8

Equation for resultant force

Answer 8

Resultant force = mass x acceleration

F = m x a

Question 9

Equation for momentum

Answer 9

Momentum = mass x velocity 
M = m x v

Question 10

Equation for kinetic energy

Answer 10

Kinetic energy = 0.5 x mass x (speed)^2

Ek= 1/2 x m x v^2

Question 11

Energy for gravitational potential energy

Answer 11

Gravitational potential energy = mass x gravitational field strength (g) x height
Ep = m x g x h

Question 12

Equation for power

Answer 12

Power = Energy transferred / time
P = e / t

Question 13

Equation for power including work done

Answer 13

Power = work done / time
P = w / t

Question 14

Equation for efficiency

Answer 14

Efficiency = useful output energy transfer or useful power output / total input energy transfer or total power input

Question 15

Equation for wave speed

Answer 15

Frequency x wavelength

V = f x A

Question 16

Equation for charge flow

Answer 16

Charge flow = current x time

Q = I x t

Question 17

Equation for potential difference

Answer 17

Potential difference = current x resistance

V = I x R

Question 18

Equation for power

Answer 18

Potential difference or (current)^2 x current or resistance