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Equations (Power (Work done/ Time Taken, P=W/t, P(W)= W(J)/t(s), Potential…
Equations
Power
Work done/ Time Taken
P=W/t
P(W)= W(J)/t(s)
Potential Difference x Current
P= VI
P(W)= V(v) x I(A)
Weight
Mass x Gravitational Field Strength
W=mg
W(N)= m(kg)x g(N/kg)
Force to a spring
Spring Constant x Extension
F=ke
F(N)= k(N/m)x e(m)
Gravitational Potential
Mass x Gravitational Field Strength x Height
Ep= mgh
Ep(J)= m(kg)xg(N/kg)xh(m)
Charge Flow
Current x time
Q= It
Q(C) = I (A) x t(s)
Energy Transferred
Power x Time
E= Pt
E(J)=P(W) x t(s)
Density
Mass/volume
ρ= m/v
ρ(kg/cm3) = m(kg)/ v(cm3)
Work done
Force x Distance
W= Fs
W(J)= F(N) x s(m)
Efficiency
Useful/Total
Useful(W)/Total(W)