equations deck

Question 1

average speed, distance and time

Answer 1

speed = distance ÷ timespeed = distance⁄time

Question 2

force, mass and acceleration

Answer 2

force = mass x acceleration

Question 3

acceleration, change in velocity and time taken

Answer 3

acceleration = change in velocity ÷ time taken

Question 4

density, mass and volume

Answer 4

density = mass ÷ volume

Question 5

work done, force and distance moved

Answer 5

work done = force x distance moved

Question 6

energy transferred and work done

Answer 6

energy transferred = work done

Question 7

kinetic energy, mass and speed

Answer 7

kinetic energy = 1/2 x mass x speed2

Question 8

gravitational potential energy, mass, g and height

Answer 8

gravitational potential energy = mass x g x height

Question 9

weight, mass and gravitational field strength

Answer 9

weight = mass x gravitational field strength

Question 10

pressure, force and area

Answer 10

pressure = force ÷ area

Question 11

moment, force and perpendicular distance from pivot

Answer 11

moment = force x perpendicular distance from pivot

Question 12

charge, current and time

Answer 12

charge = current x time

Question 13

voltage, current and resistance

Answer 13

voltage = current x resistance

Question 14

wave speed, frequency and wave length

Answer 14

wave speed = frequency x wave length

Question 15

refractive index, angle of incidence, angle or refraction

Answer 15

n = sin i ÷ sin r

Question 16

refractive index and critical angle

Answer 16

n = 1 ÷ sin c

Question 17

efficiency, useful energy output and total energy input

Answer 17

efficiency = useful energy output ÷ total energy input

Question 18

pressure difference, depth, density and g

Answer 18

pressure difference = density x g x depth