Relationship Equations

Question 1

Average speed, distance, time

Answer 1

Speed =distance ÷ time

Question 2

Force, mass and acceleration

Answer 2

Force = mass x acceleration

Acceleration = change in velocity ÷time taken

Question 3

Density, mass and volume

Answer 3

Density = mass ÷ volume

Question 4

Work done, force and distance

Answer 4

Work done = force x distance in direction of force

Question 5

Energy transferred, work done

Answer 5

They are the same

Question 6

Kinetic energy

Answer 6

0.5 x mass x speed2

Question 7

gravitational potential energy

Answer 7

Mass x g height

Question 8

Mass, weight, gravitational field strength

Answer 8

Weight = mass x gravitational field strength

Question 9

Applied force, pressure, area

Answer 9

Pressure = force ÷ area

Question 10

Moment, force and perpendicular distance from pivot

Answer 10

Moment = force x perpendicular distance

Question 11

Charge, current, time

Answer 11

Charge = current x time

Question 12

Voltage, current and resistance

Answer 12

Voltage = current x resistance

Question 13

Speed, frequency and wavelength

Answer 13

Wave speed = frequency x wavelength

Question 14

Electrical power, voltage and current

Answer 14

Power = voltage x current

Question 15

Refractive index, angle of incidence and angle of refraction

Answer 15

N = sin I ÷ sin r

Question 16

Pressure difference

Answer 16

Difference = height x density x g