Physics Paper 2 - Equations and Units

Which equation is correct?

• Work done = Power ÷ time taken

• Work done = Power x time taken

• Power = work done ÷ time taken

• Power = (work done)² x time

Which equation is correct?

• Force = work done x distance

• Work done = Force x distance

• Distance = Work done x Force

• Force = Work done ÷ distance

Which Equation is correct?

• Moment of a force = force x distance

• Moment of a force = Normal force ÷ normal distance

• Moment of a force = force ÷ distance

• Moment of a force = force x distance normal to the direction of the force

Which equation is correct?

• Density = Mass ÷ Volume

• Density = Mass x Volume

• Density = Volume ÷ Mass

State the equation linking power, energy and time

• Energy = Power x time

• time = power / energy

• power = time / energy

• energy = power / time

State the equation that links potential difference, Current and power

• current = power x potential difference

• Power = current x potential difference

• potential difference = power x current

• power = current / potential difference

State the equation that links power current and resistance

• power = current x resistance

• resistance = power / current

• power = (current)² x resistance

• power = current x (resistance)²

State the equation that links change, potential difference and energy

• Potential difference = energy x charge

• charge = potential difference x change

• energy = potential difference / charge

• energy = potential difference x charge

State the equation that links charge , current and time

• Charge = current x time

• charge = current / time

• current = charge x time

• current = time / charge

State the equation that links potential difference, current and resistance

• resistance = current / potential difference

• current = resistance x potential difference

• potential difference = current x resistance

• potential difference = current / potential difference