jan mocks dk Flashcards
graph of grav field strength against r
graph of grav potential against r
height of geostationary satellites
35768 above earths surface
height of polar satellite
200-1000km
damping graph
same as a resonance graph with lower peak and moved left
relationship between d and t in free fall
d is prop to t^2
thinking distance prop to
prop to speed
breaking distance prop to
prop to speed^2
mass
measure of an objects resistance to acceleration
g varies due to
- non uniformities in the shape and composition of the planet
- effect of earths rotation about its axis
- varying from zero at poles to max at equator
couple
2 = and oppositely directed parallel coplanar forces whos lines of action dont intersect
- produce a rotation
- cant produce a resultant force so cant. produce linear motion
torque due to a couple
moment of a couple
F*perp distance between the forces
man standing in lift eq
M(a+g) = F
pressure in liquids
pgh + 101kPa
pressure due to water + atmospheric
drag prob to
speed^2
perpetual motion
- a device in which once started will continue to move and do work without any further input of energy
- impossible due to conservation of energy
forms of energy
- kinetic
- GPE
- chemical
- elastic potential
- electrical potential
- nuclear
- radiant
- sound
- thermal
gpe
due to the position of a mass in a uniform grav field = mgh
chemical energy
due to the bonds between atoms in a substance
radiant energy
due to EM waves
thermal energy
due to randomly distributed potential and kinetic energies of atoms within a system
KE SHM
1/2 k(A^2 - x^2)
keplers second law
a line segment joining a planet and the sun sweeps out = areas during = time intervals
spring in parallel/ series
in series - reciprocal sum
in parallel - add
