Mechanics Flashcards
1
Q
Kinematics
A
V = u + at V^2 = u^2 + 2as s = ut + 0.5at^2 S = vt - 0.5at^2 S = 0.5(u + v)t
2
Q
Force
A
F = mass x acceleration
3
Q
Momentum
A
Mass x velocity
4
Q
Impulse
A
= Ft
= mv - mu
(Ns)
5
Q
Work Done
A
Force in direction of motion x distance moved in direction of motion
6
Q
Power
A
= Force x Velocity
7
Q
Law of restitution
A
e = speed of separation / speed of approach
8
Q
Friction
A
Reaction force x friction component thing
9
Q
Work energy principle
A
Kinetic energy lost = pe gained + work done against friction
10
Q
Loss in mechanical energy
A
Potential energy - kinetic energy
11
Q
Elastic strings
A
Tension = coefficient of elasticity x extension / length
EPE = coefficient of elasticity x extension^2 / 2length
12
Q
Oblique impacts
A
Vcos(x) = ucos(y) Vsin(x) = eusin(y) Tan(x) = etan(y)
Y to x
