# Physics Unit 2 equations

Flashcards of physics equations for Unit 2, from start of chapter/section 1 to end of chapter 4 (not 5, 6 or 7). Taken from AQA revision guide/ classwork.

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• Created by: hypatia13
• Created on: 22-11-12 12:27
Equation for speed?
Speed, m/s= distance, m / time, s (/ = divided by)
1 of 15
Equation for acceleration?
a = v-u/t (a= acceleration, m/s2; v= final velocity, m/s; u= initial velocity, m/s; t= time, s)
2 of 15
Equation for finding the resultant force?
F = m x a (F= resultant force, N; m= mass,g; a= acceleration, m/s2)
3 of 15
For falling objects, what is the equation now?
W = m x g (W= weight, N; m= mass; g= acceleration due to gravity, m/s2)
4 of 15
Equation for Hooke's Law?
F = k x e (F= force, N; k = spring constant; e= extension, m)
5 of 15
Equation for work done?
W = F x d (W= work done, J; F= force, N; d= distance moved in the direction of the force, m)
6 of 15
Equation for gravitational potential energy?
Ep = m x g x h (Ep= change in g.p.energy, J; m= mass, kg; g= gravitational field strength, N/kg; h= height change, m)
7 of 15
Equation for power?
P= E/t (P= power, W; E= energy, J; t= time, s)
8 of 15
Equation for kinetic energy?
Ek= 1/2 x m x v2 (Ek= kinetic energy, J; 1/2 is a half/0.5/divide by 2; v= speed, m/s - then square it)
9 of 15
Equation for momentum?
p = m x v (p= momentum, kg m/s; m= mass, kg; v= velocity, m/s)
10 of 15
Equation for current? (Links current, charge and time)
I= Q/t (I= current, amperes, A; Q= charge, coulombs, C; t= time, s)
11 of 15
Equation linking potential difference, work done and charge?
V= W/Q (or in other order correctly with W or Q the subject) (V= potential difference, volts, V; W= work done, J; Q= charge, C)
12 of 15
Work done is equal to energy transferred, therefore the above equation could also be...?
V = E/Q (E= energy transferred, joules, J)
13 of 15
Equation for resistance?
R = V/I (R= resistance, ohms; V= potential difference, volts, V; I= current, amps, A)
14 of 15
Equation to calculate current?
I = V/R
15 of 15

## Other cards in this set

### Card 2

#### Front

Equation for acceleration?

#### Back

a = v-u/t (a= acceleration, m/s2; v= final velocity, m/s; u= initial velocity, m/s; t= time, s)

### Card 3

#### Front

Equation for finding the resultant force?

### Card 4

#### Front

For falling objects, what is the equation now?

### Card 5

#### Front

Equation for Hooke's Law?

#### Back

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Really nice revision cards that you can use to test all of the equations you need to know for AQA P2.

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