Equations

Question 1

Weight

Answer 1

W(weight) = m(mass) x g(gravitational field strength)

Question 2

Work Done

Answer 2

W(work done) = F(forces) x s(distance)

Question 3

Force applied to a spring

Answer 3

F(force applied) = k(spring constant) x e(extention)

Question 4

Distance Travelled

Answer 4

S(distance travelled) = V(speed) x t(time)

Question 5

Acceleration

Answer 5

a(acceleration) = /\v(change in velocity)
t(time taken)

Question 6

Resultant Force

Answer 6

F(resultant force) = m(mass) x a(acceleration)

Question 7

Momentum

Answer 7

P(momentum) = m(mass) x v(velocity)

Question 8

Kinetic Energy

Answer 8

E(kenetic energy) = 0.5 x m(mass) x v(speed

Question 9

Gravitaional potential energy

Answer 9

Ep(gpe) = m(mass) x g(gfs) x h(height)

Question 10

Power

Answer 10

P(power) = E(energy transferred
t(time)

Question 11

Power

Answer 11

P(power) = W(work done)
t(time)

Question 12

Efficiency

Answer 12

Efficiency = J(useful output energy transfer)
J(total input energy transfer)

Question 13

Efficiency

Answer 13

Efficiency = useful power output
total power input

Question 14

Wave speed

Answer 14

V(wave speed) = f(frequency) x y(wavelength)

Question 15

Charge flow

Answer 15

Q(charge flow) = I(current) x t(time)

Question 16

Potential difference

Answer 16

V(pd) = I(current) x R(resistance)

Question 17

Power potential difference

Answer 17

P(power) = V(potential difference) x I(current)

Question 18

Power current

Answer 18

P(power) = I(current)2 x R(resistance)

Question 19

Energy transferred (rp)

Answer 19

E(et) = P(power) x t(time)

Question 20

Energy transferred charge flow

Answer 20

E(et) = Q(charge flow) x V(potential difference)

Question 21

Density

Answer 21

P(density) = m(mass)
V(volume)