Simple Machines

What is the fixed point around which a lever is free to turn?

• fulcrum
• resistance
• effort
• lever

What kind of simple machine is a wheelchair ramp?

• wheel and axle
• pulley
• wedge
• inclined planes

Tags

NGSS.MS-PS2-1

One or two inclined planes that move when used. Thick at one end and thin at the other.

• wedge
•   screw
• wheel and axle 
• pulley

Tags

NGSS.MS-PS2-1

NGSS.MS-ETS1-1

NGSS.MS-ETS1-4

NGSS.MS-ETS1-2

A wheel is attached to a shaft. A doorknob is an example.

• wedge

• screw

• wheel and axle 

• pulley

An inclined plane wrapped around a straight piece of metal.

• wedge
• screw
• wheel and axle
• pulley

Tags

NGSS.MS-ETS1-4

A simple machine is a device that helps reduce the amount of _____ required to do work.

• force

• energy

• work

Tags

NGSS.MS-PS2-2

Which statement correctly explains a compound machine?

• A compound machine is made up of one or more simple machines.

• A compound machine is made up of two or more simple machines.

• A screw is a type of inclined plane.

• None of the above.

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

Using a lever, Joe is able to lift a 10,000 N car off the ground with a force of 1,000 N. What is the mechanical advantage of the lever (MA = Output Force / Input Force)?

• 1

• 10

• 100

• 1000

Tags

NGSS.MS-PS2-2

What is a machine?

• An object that has artificial intelligence.

• An object that is designed to take over the earth in 2050.

• A device that changes force by reducing it over a larger distance.

• A mechanism that is used to decrease the amount of work done.

Tags

NGSS.MS-PS2-2