Formulas

Question 1

What is the formula for wave speed?

Answer 1

Wave speed = frequency x wavelength

Question 2

What is the formula for momentum?

Answer 2

Momentum = mass x velocity

Question 3

What is the formula for efficiency?

Answer 3

Efficiency= useful energy/ input energy

Question 4

What is the formula for weight?

Answer 4

Weight = mass x gravitational field strength

Question 5

What is the formula for force?

Answer 5

Force = mass x acceleration

Question 6

What is the formula for acceleration?

Answer 6

Acceleration = change in velocity / time taken

Question 7

What is the formula for distance travelled?

Answer 7

Distance travelled = average speed x time

Question 8

What is the formula for kinetic energy?

Answer 8

KE = 1/2 x mass x velocity2

Question 9

What is the formula for change in gravitational potential energy?

Answer 9

GPE = mass x gravitational field strength x change in vertical height

Question 10

What is the formula for inertial mass?

Answer 10

Inertial mass= force/ acceleration

Question 11

What is the formula for payback time?

Answer 11

Payback time= initial cost/ saving