Word equations

Question 1

What is the equation for weight?

Answer 1

weight = mass x gravitational field strength

Question 2

What is the equation for work done?

Answer 2

work done = force x distance

Question 3

What is the equation for the force applied to a string?

Answer 3

force applied to a string = spring constant x extension

Question 4

What is the equation for the moment of a force?

Answer 4

moment of a force = force x distance

Question 5

What is the equation for pressure?

Answer 5

pressure = force normal to surface / area of that surface

Question 6

What is the equation for distance travelled?

Answer 6

distance travelled = speed x time

Question 7

What is the equation for acceleration?

Answer 7

acceleration = change in velocity / time taken

Question 8

What is the equation for resultant force?

Answer 8

resultant force = mass x acceleration

Question 9

What is the equation for momentum?

Answer 9

momentum = mass x velocity

Question 10

What is the equation for kinetic energy?

Answer 10

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

Question 11

What is the equation for gravitational potential energy?

Answer 11

gravitational potential energy = mass x gravitational field strength x height

Question 12

What is the equation for power using energy transferred?

Answer 12

power = energy transferred / time

Question 13

What is the equation for power using work done?

Answer 13

power = work done / time

Question 14

What is the equation for efficiency using energy transfer?

Answer 14

efficiency = useful energy output transfer / total energy input transfer

Question 15

What is the equation for efficiency using power?

Answer 15

efficiency = useful power output / total power input

Question 16

What is the equation for wave speed?

Answer 16

wave speed = frequency x wavelength

Question 17

What is the equation for charge flow?

Answer 17

charge flow = current x time

Question 18

What is the equation for potential difference?

Answer 18

potential difference = current x resistance

Question 19

What is the equation for power using potential difference?

Answer 19

power = potential difference x current

Question 20

What is the equation for power using resistance?

Answer 20

power = (current)^2 x resistance

Question 21

What is the equation for energy transferred using power?

Answer 21

energy transferred = power x time

Question 22

What is the equation for energy transferred using potential difference?

Answer 22

energy transferred = charge flow x potential difference

Question 23

What is the equation for density?

Answer 23

density = mass / volume