[SC F2] 8.2 (D) Moment of Force

The moment of force depends on TWO factors, namely

• the force applied

• perpendicular distance of the fulcrum to the force

• power in the fulcrum and force

• time from fulcrum and force

Select TWO situations that involve a moment of force

• Lifting a pail

• Tighten the nut with a wrench

• Opening a door

• Raising the flag

Moment of force is smaller when applied force is smaller.

• TRUE

• FALSE

What is the unit of moment f force?

• N

• m

• Nm

• N/cm

What is the moment produced by the 15 N?

• 15 Nm

• 150 Nm

• 1.5 Nm

• 0.15 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

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 moment of force applied to the wrench?

• 7.5 Nm

• 1.5 Nm

• 750 Nm

• 150 Nm

Moment of force is bigger if the force acts further from turning point

• TRUE

• FALSE

Which of the following will loosen a nut more easily?

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

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

• a long spanner because a larger force will be applied..

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

Diagram shows Airin and Ammar sitting on a see-saw. The weight of Airin is 300 N while Ammar is 400 N. What is the distance of Ammar from the fulcrum so that the see-saw is balanced?

• 1 m

• 2 m

• 3 m

• 4 m

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4