Simple Machines

Identify this simple machine

• Lever
• Wheel & Axle
• Inclined Plane
• Screw

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance
• increase the speed that work gets done in

• change the direction of the applied force
• all of the above

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum 

A seesaw is an example of a  

• wedge
• lever 
• inclined plane 
• pulley 

What is effort (input) force?

• the force required by a machine in order to accomplish work (the force you put on the 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-PS2-2

What is resistance (output) force?

• the force required by a machine in order to accomplish work (the force you put on the 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-PS2-2

The mechanical advantage of this inclined plane is.....

• 2.4
• 3.4
• 4.4

Mechanical Advantage (MA) is:

• how much more work the machine does

• how much stronger the machine makes you

• How much less work the machine needs to do

• the force you put into the work

Tags

NGSS.MS-ETS1-1

If MA is 2, this means :

• the machine makes you 2 times weaker

• the machine makes you 2 times slower

• the machine does 2 times the work

• MA cannot be greater than 1