Moments

Moment is a measure of the turning effect of a force.

• True

• False

The greater the force, the greater its turning effect.

• True

• False

The further the force is from the pivot, the greater its turning effect.

• True

• False

The figure below shows a man lifting a heavy rock using a steel bar. He pushes downwards on the end of the bar with a force F.

Which pivot positions allows the force F to be as small as possible?

• A

• B

• C

• D

The easiest way to open a heavy door  is by applying the force

• Near the hinges
• In the middle of the door
• At the edge of the door far from the hinges
• At the top of the door

The moment of a force causes an object to

• move forward

• move backward

• stop moving

• turn about a fixed point