Moments and Levers

Question 1

you need to loosen a nut. there is a spanner with a short handle and another with a long handle, which one is easier to use? why?

Answer 1

the one with the longer handle. becuase the longer the handle, the less force you need to exert on it to loosen the nut

Question 2

what is the moment?

Answer 2

when a force applied to an object makes it turn about a pivot (turning effect of the force)

Question 3

what happens if there’s a larger force?

Answer 3

the larger the moment (turning effect)

Question 4

what happens if there’s a larger perpendicular distance from the pivot to the point where the force is applied?

Answer 4

the larger the turning effect

Question 5

how do we increase the moment?

Answer 5

increase the force, increase the distance from the pivot

Question 6

in terms of levers, what is the weight of an object called?

Answer 6

the load

Question 7

in terms of levers, what is the force a person applies to the lever called?

Answer 7

effort

Question 8

what is a force multiplier?

Answer 8

a force multiplier exerts a greater output force than input force eg using a crowbar, the effort needed to lift an object is only a small fraction of its weight

Question 9

what is the point about a lever turns called?

Answer 9

a pivot

Question 10

what is the line of action?

Answer 10

the line that a force acts along

Question 11

what is the equation for moment?

Answer 11

moment, M (Nm) = force, F (N) x perpendicular distance from the line of action of the force to the pivot, d (m) - (obvs u can rearrange this equation)

Question 12

principle of moments

Answer 12

clockwise moments = anti-clockwise moments