moments of forces

What to we call forces applied to anything that turns?

• Minute

• Moment

• Minimum

• Monument

What is the formula for moments?

• Force = Distance x time

• Moment = Force $\div$ distance

• Moment = Force x distance

• Force = distance x Moment

What are the units for Moment?

• N

• kgm/s

• kN

• Nm

A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the turning force applied to the wrench?

• 7.5 Nm

• 1.5 Nm

• 750 Nm

• 150 Nm

A beam lies on a pivot. If F1 = F2 the beam which side has the greatest moment?

• down left

• down right

What is the resultant turning moment and direction?

• 20 Nm anticlockwise

• 30 Nm anticlockwise

• 10 m clockwise

• 130N clockwise

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

Work is done when a force makes an object ______

• move

• heat up

• light up

• turn on

A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?

• The larger person moving further away from the center.
• Moving the smaller person closer to the center.
• Moving the smaller person further from the center.
• Making the larger person do nothing.

Tags

NGSS.HS-PS2-1

What is the moment produced by the 15 N?

• 15 Nm (clockwise)
• 150 Nm (anti - clockwise)
• 1.5 Nm (anti - clockwise)
• 0.15 Nm (clockwise)