last min Flashcards
(18 cards)
circular motion
constant force causing an object to move in a circular path perpendicular to velocity
describe an experiment to investigate centripetal force
- spinning bung and glass cylinder
- vary mass, constant r
- 10T to reduce % uncertainty
- find v for different masses
- v= 2#R/T gradient = m/r
for a conical pendulum or circular motion at an angle, how would you find the force vertically?
Tcos(x)= mg
for a conical pendulum or circular motion at an angle, how would you find the force horizontally?
Tsin(x) = mv^2/r
how do you convert from rpm to rads^-1
2#/60
how do you convert from degrees to radians
x #/180
for a circular motion (washing machine with or roller coaster) where is the greatest force?
at the bottom as mv^2/r = R - mg
what would be the equation for a roller coaster at the top of a circular ride?
ma = R + mg
describe an experiment to find the frequency of a spring
- set up a clamp stand and add mass to a spring
- displace mass
- use fiducial marker to see where spring passes the point
- measure 10T and divide by 10 for time
- use 1/T to find F
define amplitude
max displacement to equilibrium position
define angular frequency
rate of change of angular displacement
what happens to the graph during damping
amplitude decreases and time period stays the same
when will ressonance occur
when the driving force frequency equals the natural frequency
what is keplas 1st law
orbits of a planet are elliptical with the sun at one foci
what is keplas second law
A line segment joining a planet and the sun have equal sweeps in equal time
how would we write the ratio for keplas third law
T1^2/ r1^3 = T2^2/r2^3
define boyles law
pressure is inversely proportional to volume when temperature is constant
