Physics Formulae Paper 1

Question 1

Weight

Answer 1

Weight = mass x gravitational field strength
N = kg x N/kg

Question 2

Work done

Answer 2

Work done = force x distance
J = N x m

Question 3

Force applied to a spring

Answer 3

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

Question 4

Pressure

Answer 4

Pressure = force / area
N/m squared = N / m squared

Question 5

Kinetic energy

Answer 5

Kinetic energy = 1/2 x mass x velocity squared

Question 6

Gravitational potential energy

Answer 6

Gravitational potential energy = mass x gravitational field strength x height

Question 7

Power (energy)

Answer 7

Power = energy transferred / time

Question 8

Power (work done)

Answer 8

Power = work done / time

Question 9

Efficiency (energy)

Answer 9

Efficiency = useful output energy / total input energy

Question 10

Efficiency (power)

Answer 10

Efficiency = useful power input / total power output

Question 11

Charge flow

Answer 11

Charge flow = current x time

Question 12

Potential difference

Answer 12

Potential difference = current x resistance

Question 13

Power (electricity)

Answer 13

Power = potential difference x current

Question 14

Power (electricity 2)

Answer 14

Power = current squared x resistance

Question 15

Energy transferred (power)

Answer 15

Energy transferred = power x time

Question 16

Energy transferred (charge)

Answer 16

Energy transferred = charge flow x potential difference

Question 17

Density

Answer 17

Density = mass / volume