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Flashcards in Physics Equations Deck (19):
1

Equation for Weight
(include units)

Weight(N) = mass(Kg) x gravity(n/kg)

2

Equation for work done (J)

Work done(J) = force(N) x distance(m)

3

Equation for force applied to string (N)

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

4

Equation for Distance (m)

Distance(m) = speed(m/s) x time (s)

5

Equation for Acceleration (m/s²)

Acceleration(m/s²) = change in velocity(m/s) ÷ time taken(s)

6

Equation for resultant force (N)

Resultant force (n) = mass(kg) x acceleration(m/s)

7

Equation for momentum (kg m/s)

Momentum (km/s) = mass (kg) x velocity (m/s)

8

Equation for kinetic energy (j)

kinetic energy (j) = 0.5 x mass (kg) x speed^2 (m/s)

9

Equation for Gravititional Potential Energy (GPE) (j)

GPE (j) = mass (kg) x Gravitational field strength (g) x height (m)

(Gravitational field strength is taken to be 10 on earth)

10

Equation(s) for Power (W) with (J) and (S)

Power (W) = Energy Transferred (j) (or) Work done (j) ÷ Time (s)

11

Equation for Efficiency (no units or %)

Efficiency = Useful Output (j) ÷ total input (j)

(x100 for answer as %)

12

Equation for Wave speed (m/s)

Wave speed (m/s) = frequency (Hz) x wavelength (m)

13

Equation for Charge flow (C)

Charge flow (C) = Current (A) x Time (s)

14

Equation for Potential Difference (P.D) (Volts)

Potential Difference (V) = Current (A) x Resistance (Ω) (Ohms)

15

Equation for Power (W) with (V) and (A)

Power (W) = P.D (V) x Current (A)

16

Equation for Power (W) with (A) and (Ω)

Power (W) = Current^2 (A) x Resistance (Ω)

17

Equation for Energy transferred (J) with (W) and (S)

Energy Transferred (J) = Power (w) x Time (s)

18

Equation for Energy transferred (J) with (C) and (V)

Energy transferred (J) = Charge (C) x P.D (V)

19

Equation for Density (kg/m^3)

Density (kg/m^3) = Mass (kg) ÷ Volume (m^3)