Levers and Moments

The place where a lever pivots is called the _______.

• Pivot point
• Tissue
• Fulcrum

What kind of lever is this?

• First Class Lever
• Second Class Lever
• Third Class Lever

Humans have all 3 levers in their  bodies.

• True
• False

A lever is used to raised a mass with a wight of 12 Newtons using only 4 Newtons of force. How many times does the lever multiply the force?

• 12
• 4
• 3
• 32

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?

• 200 J
• 20J
• 100 J
• 10 J

The units for work are

• netwons
• joules
• meters
• seconds

If you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J
• 30 J
• 120 N 
• 30 N

 Work done = Force x blank?

• a. distance
• b. acceleration
• c. velocity
• d. speed

What is the anticlockwise moment acting on this crane?

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

Tags

NGSS.HS-PS2-1

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

• Pivot
• Lever
• Wedge