M2 Dynamics Flashcards
1
Q
Newton’s first law of motion
A
- Law of Inertia.
- An object will continue in its current state of motion unless acted upon by an unbalanced force.
2
Q
Newton’s second law of motion
A
F = ma
3
Q
Newton’s third law of motion
A
For every action there is an equal and opposite reaction.
4
Q
Coefficient of friction
A
Ff = mu x FN.
5
Q
Work-Kinetic Energy Theorem
A
W = change in EK.
6
Q
Conservation of mechanical energy
A
change in EK + change in U = 0
mv2/2 - mu2/2 + mgh = 0.
7
Q
Momentum
A
amount of inertia an object has. p = mv.
8
Q
Impulse
A
change in momentum I = change in p = F x change in t
9
Q
Conservation of momentum
A
Applies to elastic (no kinetic energy lost) and inelastic collisions.
sum of mv (before) = sum of mv (after)
10
Q
Conservation of kinetic energy
A
Only applies to elastic collisions. mv2/2 before = mv2/2 after
