Year 8 Moments

What is the size of the moment acting on the seesaw?

• 1.6Nm

• 15Nm

• 16N

• 4Nm

1. A _________is a simple machine with a pivot and a rigid bar.

• Fulcrum

• Lever

• Wedge

• Pulley

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

• 30 Nm

• 36 Nm

• 40 Nm

• 60 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

• 75 Nm

• 750 Nm

• 150 Nm

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.MS-PS2-1

NGSS.MS-PS2-2

What is the anticlockwise moment acting on this crane?

• 80,000Nm
• 100,000Nm
• 120,000Nm
• 140,000Nm

Tags

NGSS.HS-PS2-1

What is the clockwise moment acting on this crane?

• 80,000Nm

• 100,000Nm

• 120,000Nm

• 140,000Nm

What is the resultant moment acting on this crane?

• -100,000 Nm

• -20,000 Nm

• 0 Nm

• 80,000 Nm

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

• 450 N

• 350 N

• 4.5 N

• 200 N