Equations Flashcards
1
Q
Speed
A
Distance/time (m/s)
2
Q
Acceleration
A
Change in speed/ time taken (m/s2)
3
Q
Weight
A
Mass x gravity (N)
4
Q
Density
A
Mass/ volume (kg/m3)
5
Q
Force
A
Mass x acceleration (N)
(mv - mu)/t
6
Q
Hooke’s force
A
Spring constant x extension (N)
7
Q
Moment
A
Force x perp. distance from pivot (Nm)
8
Q
Momentum
A
Mass x velocity (m/s2)
P=mv
9
Q
Impulse
A
Ft= mv - mu
Force x time = mass x final velocity - mass x initial velocity
10
Q
Kinetic energy
A
1/2mv2 (J)
11
Q
G.P.E
A
Mgh (J)
12
Q
Efficiency
A
Useful energy output/ energy input x100
Useful power output/ energy input x100
13
Q
Work done (2)
A
Force x distance (J)
Power x time taken
14
Q
Power
A
Work done/ time taken (N)
15
Q
Energy
A
Power x time
Mass x specific heat capacity x change in temp.
