rip Flashcards
2 springs in parallel
each spring experiences half of the force applied and has force constant of sum of both
period and amplitude of oscillator
independent of each other
work done definition
force x distance moved in direction of the force
ways a crane can be modified to improve its efficiency
oil bearings to reduce friction
stiffer cable to reduce energy loss through stretching
centripetal force meaning
force acts perpendicular to direction of motion
centripetal force experiment
glass tube, string, bung and masses
vary string length and calculate velocity
graph of velocity squared against radius of circle
should get straight line through gradient
determine acceleration due to free fall from v^2 against h graph
mgh=1/2mv2
conservation of energy
graph has straight line gradient
gradient= 2g
up thrust and drag
both act upwards on an object falling in water
sources of error when timing drop of steel ball onto trapdoor
trapdoor doesn’t open immediately
increase height to decrease uncertainty
how to reduce error when doing ball on ramp experiment
make distance as long as possible to reduce percentage uncertainty in timing
use release mechanism to release ball
ensure ball not pushed when released
how to measure force applied to ball from ball-release mechanism
pull back plate with newton meter
finding centre of gravity practical
hang object freely from clamp and stand
hang plumbline
repeat and hang from diff points
where lines intersect is centre of gravity
when does an oscillator dissipate max energy
when has max speed as has greatest friction
earth vs mars
direction of g opposite
g at earth’s surface greater than at mars’ as earth has larger mass
why doesn’t clothes and washing machine obey newton’s 3rd law
both forces act on same object
different types of force
