T5 moments, levers and gears

Question 1

what is an alternative name for the turning effect of a force

Answer 1

a moment

Question 2

equation used to calculate the moment of a force

Answer 2

moment of force = force x distance

moment (Nm), force (N), distance (m)

Question 3

what distance measurement is used when calculating a moment

Answer 3

perpendicular distance from the pivot to the line of action of the force

Question 4

if an object is in equilibrium, what can be said about the moments acting on the object

Answer 4

the clockwise moments are equal to the anticlockwise moments

Question 5

what 3 parts make up a lever system

Answer 5

1. load
2. effort
3. pivot

Question 6

how can a lever be used as a force multiplier

Answer 6

if the distance between the effort and pivot is greater than the distance between the pivot and load, the force applied on the load is greater than the effort force

this is since the moment on both the effort and load must be the same

Question 7

give an example of when a lever may be used to multiply a force

Answer 7

a wrench, which has a long handle so that the force applied by the user is multiplied

Question 8

what determines the moment of a gear wheel

Answer 8

the size of the wheel

Question 9

describe the moment and speed of a larger gear being driven by a smaller gear

Answer 9

the larger wheel will rotate more slowly but will also produce a larger moment