Physics Formulas

Question 1

distance

Answer 1

distance = average speed x time

Question 2

acceleration

Answer 2

acceleration = change in velocity / time taken

Question 3

force

Answer 3

force = mass x acceleration

Question 4

weight

Answer 4

weight = mass x gravitational field strength

Question 5

efficiency

Answer 5

efficiency = useful energy transferred / total energy supplied

Question 6

momentum

Answer 6

momentum = mass x velocity

Question 7

wave speed

Answer 7

wave speed = frequency x wavelength

Question 8

wave speed 2

Answer 8

wave speed = distance / time

Question 9

density

Answer 9

density = mass / volume

Question 10

work done

Answer 10

work done = force x distance moved in direction of force

Question 11

change in gravitational potential energy

Answer 11

change in gravitational potential energy = mass x gravitational field strength x change in verticle height

Question 12

kinetic energy

Answer 12

KE = 1/2 x mass x speed

Question 13

power

Answer 13

power = work done / time taken

Question 14

energy transferred

Answer 14

energy transferred = charge moved x potential difference

Question 15

charge

Answer 15

charge = current x time

Question 16

potential difference

Answer 16

potential difference = current x resistance

Question 17

power 2

Answer 17

power = energy transferred / time taken

Question 18

electrical power

Answer 18

electrical power = current x potential difference

Question 19

electrical power 2

Answer 19

electrical power = current squared x resistance

Question 20

force exerted on a spring

Answer 20

force exerted on a spring = spring constant x extension

Question 21

moment of a force

Answer 21

moment of a force = force x distance normal to the direction of the force

Question 22

pressure

Answer 22

pressure = force normal to surface / area of that surface