machines and mechanical advantage

In a first-class lever, ...

• the effort is located between the fulcrum and the resistance
• the fulcrum is located at the end of the lever
• the resistance is located between the fulcrum and the effort
• the fulcrum is located between the effort and the resistance

In a second-class lever, ...

• the effort is located between the fulcrum and the resistance
• the resistance is located between the fulcrum and the effort
• the fulcrum is located between the effort and the resistance
• the resistance is located at the end of the lever

The unit for power is the ...

• watt
• joule
• newton
• dyne

When the distance between the effort and the fulcrum is shorter than that between the load and the fulcrum, the lever _______.

• increases effort

• reduce effort

• moves

• stays balanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

• 12

• 4

• 3

• 32

WHAT ARE THE 3 MAIN PARTS OF A LEVER?

• FOOT, EFFORT, REPORT
• FULCRUM, STRUCTURE, EFFORT
• FULCRUM, EFFORT, LOAD

A see saw is an example of a:

• 1st class lever
• 2nd class lever
• 3rd class lever

Tags

NGSS.MS-PS2-4

With a pulley system, you use more rope (distance), but need less ________ to lift the load.

• work

• mass

• force

• speed

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

Tags

NGSS.MS-ETS1-1

Which of the lever would it take less force to lift?

• Lever A

• Lever B

Tags

NGSS.MS-PS2-1