chapter 4 - forces in action Flashcards
state newtons second law
F=ma
what is the equation for weight
W=mg
where does all the gravitational force act on an object
its center of mass
how can you find an objects center of mass?
using a plum line
define drag
the resistive force on an object travelling through a fluid
define normal contact force
a force arising when one object rests against another
what is the equation of a force parallel to the slope
f= mg sin Q
what is the equation of a force perpendicular to the slope
f= mg cos Q
does the mass effect the acceleration of trolley?
no, acceleration is independent from mass
equation of a moment ?
F=mx
what is the principle of moments?
when body is in equilibrium, clockwise moments equal anticlockwise moments around same point
define density
density = mass/volume
define pressure
pressure= force/area
