Paper One

Question 1

Kinetic energy equation and units

Answer 1

Ek= 1/2 x mass(kg) x velocity^2 (m/s)^2

Question 2

Gravitational poetry energy equation and units

Answer 2

Ep = mass(kg) x gravity(N/kg) x height(m)

Question 3

Power one

Answer 3

Power (W) = Energy(J) / time(seconds)

Energy is the same as workdone

Question 4

Efficency

Answer 4

Efficiency = useful power out / total power in

Question 5

Charge

Answer 5

Charge(C) = Current (Amps) x Time(seconds)

Question 6

Voltage

Answer 6

Voltage(V) = Current (A) x Resistance (Ohms)

Question 7

Power (electric one)

Answer 7

Power(W) = Voltage(V) x Current (A)

Question 8

Power ( electric two)

Answer 8

Power(W) = current^2(A)^2 x resistance (ohms)

Question 9

Energy transferred

Answer 9

Energy(J) = charge (C) x Voltage(V)

Question 10

Density

Answer 10

Density (Kg/m^3) = mass (kg) / volume (m^3)

Question 11

Weight

Answer 11

Weight(N) = mass(kg) x Gravity (N/kg)

Question 12

Work done

Answer 12

Work done (J) = Force(N) x Distance (m)

Question 13

Elastic force

Answer 13

Force (N) = spring constant (N/m) x extension(m)

Question 14

Force

Answer 14

Force(N) = Mass(kg) x Acceleration (m/s^2)

Question 15

Elastic potential energy

Answer 15

Ee(J) = 1/2 x spring constant (N/m) x extension^2 (m^2)

Question 16

Specific heat capacity

Answer 16

Energy(J) = mass(Kg) x specific heat (J/kg) x temp change (degrees)