Paper 1 Flashcards
1
Q
Weight
A
W = mg Weight(N) = mass(kg) x gravitational field strength(N/kg)
2
Q
Gravitational Potential Energy
A
E[p] = mgh
Gravitational potential energy(J) = mass(kg) x gravitational field strength(N/kg) x height(m)
3
Q
Kinetic Energy
A
E[k] = ½mv{2}
Kinetic energy(J) = ½ x mass(kg) x velocity{squared}(m/s)
4
Q
Efficiency
A
Efficiency = Useful output/Total input
5
Q
Work done (a.k.a Energy transferred)
A
W = Pt Work done(J) = Power(W) x Time(s)
W = Fs Work done (J) = Force(N) x Distance parallel to the line of the force(m)
6
Q
Power
A
P = E/t Power(W) = Energy(J)/time(s)
P = IV Power(W) = Current(A) x Potential Difference(V)
P = I{2}R
Power (W) - Current(A){squared} x Resistance(Ω)
7
Q
Charge
A
Q = It Charge(C) = current(A) x time (s)
8
Q
Potential Difference
A
V = IR Potential Difference(V) = Current(A) x Resistance(Ω)
9
Q
Energy (in a circuit)
A
E = QV Energy(J) = Charge(C) x Potential Difference(V)
10
Q
Density
A
ρ = m/V
Density(kg/m{3}) = Mass(kg)/Volume(m{3})
