9A - MOMENTS

Unit of force is .........

• Meter

• Centimeter

• Newton

• Kilogram

Moment (Nm) =

• Force (N) x distance (m)

• Energy (J) x distance (m)

• Force (N) / distance (m)

• Force (kg) x distance (cm)

What do we call the turning effect of a force?

• Momentum

• Moment

• Pivot

• Angular force

What is the moment acting on the seesaw?

• 1.6 Nm

• 10 Nm

• 16 N

• 4 Nm

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

Tags

NGSS.HS-PS2-1

A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation. What is the moment applied to the wrench?

• 7.5 Nm

• 1.5 Nm

• 750 Nm

• 0.3 Nm

What is the size of the moment shown by the black arrow?

• 30 Nm

• 36 Nm

• 40 Nm

• 60 Nm

A nut can be loosened more easily with

• a short spanner because a larger turning effect can be produced.

• a long spanner because a larger turning effect can be produced.

• a long spanner because a larger force can be produced.

• a short spanner because a larger force can be produced.

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)

What is the anticlockwise moment acting on this crane?

• 80,000 Nm - moment of the load

• 100,000 Nm - moment of the load

• 100,000 Nm - moment of the concrete blocks

• 200,000 Nm - moment of the concrete blocks