Linear Kinetics Flashcards
1
Q
Law of acceleration
A
‘Rate of change of momentum = proportional to the force causing it and the direction it acts in’ f=ma
2
Q
What are the common forces
A
Weight
Drag (N)
Friction (N)
3
Q
What is weight
A
Force due to gravity (N)
Weightlessness = free fall, only gravity
4
Q
What is drag
A
Fd = 1/2 pv2 cd A
Density of fluid air (p) x speed of object relative to fluid (v)
Cd = drag coefficient
A= cross sectional area
5
Q
What is friction
A
The interaction of 2 surfaces
Ff =MN
Ff= limiting friction force
M= coefficient of friction
N= Norma reaction force
