Seesaw Balance Forces

What is the unit of force?

• Meter

• Centimeter

• Newton

Tags

NGSS.HS-PS2-1

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

Moment is a quantity that tells turning effect of a force about turning point. 

• TRUE
• FALSE

What mass now balances the bags?

• 3.5 kg

• 7.0 kg

• 12 kg

• 14 kg

Tags

NGSS.HS-PS2-1

Which statement is correct?

• All the forces are equal in size.

• The resultant force on the beam is in the opposite direction to the resultant turning effect.

• The resultant force on the beam is zero and the resultant turning effect on the beam is zero.

• The total upward force is twice the total downward force.

Which diagram shows the rod in equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

What is the weight of the beam?

• 2.0 N

• 3.0 N

• 3.3 N

• 5.0 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

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.

Jack has a weight of 300 N and sits 2.0 m from the pivot of see-saw. Jill has a weight of 450 N and sits 1.5 m from pivot. Who will move down?

• Jack

• Jill

• Both of them

• None of them

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

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

• 30 Nm

• 36 Nm

• 40 Nm

• 60 Nm