Equations Flashcards
1
Q
Weight
A
Weight= mass x gravitational field strength
W=mg
2
Q
Work done
A
work done = force × distance
w=Fs
3
Q
Force applied to a spring
A
force applied to a spring = spring constant × extension
F=ke
4
Q
Moment of force
A
moment of a force = force × distance (normal to direction of force)
M=Fd
5
Q
Pressure
A
pressure = force normal to a surface / area of that surface P= F / a
6
Q
Distance
A
Distance traveled = speed x time
D=vt
7
Q
Acceleration
A
acceleration = change in velocity / time taken a = Δv / t
8
Q
Resultant force
A
resultant force = mass × acceleration
F = ma
9
Q
momentum
A
momentum = mass × velocity p = mv
10
Q
Kinetic energy
A
kinetic energy = 0.5 × mass × (speed)2
Ek=1/2 mv2
11
Q
Gravitational potential energy
A
gravitational potential energy = mass × gravitational field strength × height
Ep = mgh
12
Q
Power
A
power = energy transferred / time P = Et
13
Q
Power
A
Power= work done/ time P= W/t
14
Q
Efficiency
A
efficiency = useful output energy transferred/ useful input energy transferred
15
Q
Efficiency
A
Efficiency = useful Power output / total power output
