Moments

Question 1

What is a moment?

Answer 1

• The roational / turning effect of a force around a pivot

Question 2

Equation to find a moment?

Answer 2

• Moment (Nm) = force (N) X distance (m)

Question 3

What is important when measuring the moment of a force?

Answer 3

• The distance must be the perpendicular distance form the pivot

Question 4

How to we describe a moment?

Answer 4

• Magnititude in Nm
• Direction in clockwise or anti-clockwise

Question 5

What is the principle of moments?

Answer 5

• If an object is balanced, the total anticlockwise moment is equal to the total clockwise moment on the object

Question 6

What is the job of a lever?

Answer 6

• Increase the size of a force acting on an object, making it easier to move

Question 7

What is the job of a gear?

Answer 7

• Multiply the effect of a turning motion using moments

Question 8

How do we find by how much the moment is increased in gears?

Answer 8

• The amount of times the radius of gear B is greater than gear A is the amount of times by which the moment will be increased

Question 9

Characteristics of gears

Answer 9

• Adjacent gears always move in opposite directions
• Total work done between both gears remains the same, only the moment is increased