Year 1 Mechanics Flashcards
Displacement
The shortest distance between two points
Vector quantity
Average speed
Distance / time
Average velocity
Displacement / time
Acceleration
A measure of how much velocity is changing
Constant acceleration equation without s
v = u + at
Constant acceleration equation without u
s = vt - 1/2at^2
Constant acceleration equation without v
s = ut + 1/2 at^2
Constant acceleration equation without a
s = 1/2 (u + v)t
Constant acceleration equation without t
v^2 = u^2 + 2as
g (maths)
9.8ms^-2
Newton’s first law
Every object constitutes in a state of rest or uniform motion in a straight line unless acted on by a resultant external force force
Newton’s second law
F = ma
F = (mv)/t
F = ma
Force = mass x acceleration
Newton’s third law
When object A exerts a force on object B, object B exerts and equal and opposite force on object A
Particle
No size
All forces are applied at a single point
No air resistance
Light
Ignore weight
Inelastic/ inextensible
Length is constant
Smooth
Ignore friction
Forces
Weight
Resistance
Normal reaction force
Tension
Thrust
How to get velocity from displacement
Differentiate
How to get acceleration from velocity
Differentiate
How to get velocity from acceleration
Integrate
How to get displacement from velocity
Integrate
