(5) Moments

Question 1

What is the name for the Turing effect of a force?

Answer 1

Moment

Question 2

What is the equation for a moment of a force?

Answer 2

Moment of a force = force x distance

Question 3

What distance measurement is used when calculating a moment?

Answer 3

The perpendicular distance from 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 force?

Answer 4

The clockwise moment are equal to the anti-clockwise moments

Question 5

What can a simple lever and a simple gear system be used for?

Answer 5

To transmit the rotational effects of forces (they reduce the amount of work we have to do when turning objects)

Question 6

How do levers transmit the rotational effects of forces?

Answer 6

Creating leaverage, when a force is applied to one end of the lever it’s creates a moment that is proportional to the distance of the force from the turning point,

Question 7

How do gears transmit the rotational effects of forces?

Answer 7

A gear system may use a small gear with a large moment to transfer a large rotational force to a larger gear with a smaller moment. This allows the larger gear to rotate at a slower speed but with increased rotation (overcoming friction).

Question 8

Give an example of when a lever can be used as a force multiplier?

Answer 8

Wrench (has a long handle so that the force applied is multiplied)