moments and levers Flashcards
(11 cards)
whats examples of the application of moments
opening a door, pushing a wheelbarrow, cutting with scissors
do moments have a direction and what way do they go
yes they have a direction
they go clockwise or anticlockwise
whats the moment of a force about a pivot
is the product of the force an the perpendicular distance to the pivot
whats the unit for moment when in cm
Ncm
whats the moment about
is the product of a force and its perpendicular distance from the point
whats the equation for moment
moment = force x distance to the pivot
what does the principle of moment state
when a lever is balanced the sum of the clockwise moments about any point equals the sum of the anticlockwise moments about the same point
what must the upward forces equal in order to achieve equilibrium on a metre ruler
on the seesaw the upward forces must equal the downward forces
if the object is stationary what way will it remain
it will remain stationary and it will carry the same speed
what does a unbalanced force cause the object to do
it causes the object to accelerate according to f=ma
when a lever is balanced what does the clockwise moment equal
the anticlockwise moment
