Chapter 1 - Kinematics And Dynamics Flashcards
SI unit of force
Newton (N)
= (kg*m)/s^2
Équation for gravitational force
Fg = (Gm1m2)/r2
G= 6.67x10^-11
Accélération
∆V/∆t
Newton’s first law
F = ma = 0
‘Law of inertia’
Newton second law
Fnet = ma
An object of mass m will accelerate when the cet or sum of the forces results in some nonzero resultant force
Newtons 3rd law
Fab = -Fba
Law of action and reaction
Every action has an equal and opposed reaction
Write out the 4 equations of linear motion
V = Vo + at
X = Vot + (at^2)/2
V^2 = Vo^2 + 2ax
X= vt
Équations for inclined planes
Fparallel = mgsinø
Fperp = mgcosø
Équation for circular motion
Fc = (mv^2)/r
Équation for rotational equilibrium
Torque = r x F = rFsinø
r = lever arm length
F = magnitude of force
Absolute pressure. What is it and whats the equation?
“Hydrostatic pressure”
Total pressure exerted on an object that is submerged in a fluid
P = Po + pgz
Po = pressure at the surface
z = depth of object
Gauge pressure
Pgauge = P - Patm = (Po + pgz) - Patm
What is hydrostatics
Study of fluids at rest and forces and pressures associated with standing fluids
Archimedes’ Principle
Buoyancy : a body wholly or partially immersed in a fluid will be buoyed upwards by a force equal to the weight of the fluid that it displaces
Fbouy = pfluidVfluiddisplacedg
= pfluid*Vsubmerged*g
***remember to use the density of the fluid !!
Pascal’s principle
If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount
Pout = Pin
P = F1/A1 = F2/A2
F2 = F1 (A2/A1)
volume always the same!
V = A1D1 = A2D2
