Pivot Point

The diagram shows a light beam pivoted at one end. What is the effort required to lift the load?

• 50

• 67

• 100

• 200

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

The figure shows a uniform metre rule pivoted at the 50cm mark. 125g and 200g weights hang from the rule as shown. Calculate where you would hang a 25g mass in order to balance the rule horizontally

• 20 cm from pivot on the side of 125 g mass

• 10 cm from pivot on the side of 125 g mass

• 40 cm from pivot on the side of 200 g mass

• 10 cm from pivot on the side of 200 g mass

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the moment acting on the left side of the pivot?

• 2 Nm

• 20 Nm

• 200 Nm

• 0.2 Nm

What is the moment acting on the right side of the pivot?

• 2 Nm

• 20 Nm

• 200 Nm

• 0.2 Nm

James weighs 200 N and sits 1 m from the pivot. Jane weighs 100 N. How far from the pivot must Jane be to balance the beam?

• 0.5 m

• 1 m

• 2 m

• 4 m

Tags

NGSS.MS-PS2-4

The further the force is from the pivot, the greater its turning effect.

• True

• False

The beam is balanced.

• True

• False

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

• 8 Nm

• 6 Nm

• 2 Nm

• 3 Nm

In a balanced seesaw, if a child weighing 200 N sits 3 meters from the pivot, how far should a 300 N child sit on the opposite side to balance it?

• 2 meters

• 1 meter

• 3 meters

• 2.5 meters