Mechanics 2 Flashcards
Pressure
Force per unit area
Pascals
Pressure depends on ..
Depth
Density
Acceleration due to gravity
Archimedes principle
When an object is immersed in a fluid it will receive an upthrust equal to the weight of the fluid displaced
Law of floatation
When an object floats the weight of the object equals the weight of the fluid displaced
Measuring density.
Measuring atmospheric pressure.
Hydrometer
Barometer
Boyle’s law
And any formulas needed
For a fixed mass of gas at a fixed temperature the pressure of gas in inversely proportional to the volume of gas
p x V=k
p1 x V1= p2 x V2
Boyle’s law graph
Pa | /
| /
|________ /
1/V
Moment of a force
M=F x d
F= force , d= perpendicular distance from the line of action of the force to the axis
Moment of a couple
T= F x d
F= force, d= perpendicular distance between the lines of action
Lever
Rigid body free to rotate around a fixed point(fulcrum)
Laws of equilibrium
The vector sum of forces in any direction on the body is 0
The sum of the moment of the forces about any point on the body is 0
Derive the relationship between angular velocity and linear velocity
By def w=0/t
w=s/rt. (0=s/r)
w=1/r(s/t)
w=v/r
rw=vCentripetal force/acceleration
The force/act acting towards the center of a circle for an object undergoing circular motion
Newton’s law of universal gravitation
F=Gm1m2/d^2
G=gravitational constant, m1,m2=mass values, d= distance between masses
For a satellite of be geostationary in relation to the earth
Must have the same rotational period
Must move in the same direction as the rotation of the earth
Orbit the earth in equatorial plane
