Machines grade 8

When a machine takes a small input force and increases the magnitude of the output force, WHAT HAS BEEN PRODUCED? 

• Energy 
• Mechanical Advantage 
• The conversion of rotational (turning) motion to linear motion  (movement in a straight line).
• Work 

Tags

NGSS.MS-PS2-2

What is a system?

• The fixed point at which a lever pivots.
• A group of parts that work together to perform a function.
• A push or pull on an object that may result in a change in the object’s motion or shape
• Unintended or undesirable outputs

Tags

NGSS.MS-LS1-3

NGSS.MS-LS2-3

Which of these is not a simple machine?

• Wheelbarrow 
• Screw
• Wheel and axle 
• Pulley 

What is the purpose of machines? 

• To recapture lost energy of prevent energy from escaping in the first place
• To reduce the amount of friction between two sliding parts
• To measure of how strong force is
• To help us use energy more efficiently/ do work easier. 

How does an inclined plane help us do work?

• Allows us to move heavy objects using a smaller force
• Magnifies input force
• Can be used to increase the size of the force or the speed
• By minimizing any force lost because of friction/slippage. 

Tags

NGSS.MS-ETS1-1

What two forces are involved when a machine is used to do work?

• push & pull 
• input force & output force 
• gravity & buoyancy 
• weight & gravity

What is mechanical advantage? 

• Basic accuracy training. 
• A measure of how strong the force of gravity is between two objects.
• When a machine reduces the chances of effectiveness.
• A measure of how much easier the machine makes the work.

What is not an input for a car?

• Applying force on the gas pedal 
• Movement 
• Turning the steering wheel 
• Gasoline

Effort Force 

• is the force EXERTED BY a machine
• is also known as Resistance Force 
•  is the force APPLIED TO a machine on the input arm 
• is applied to the resistance/load/ output arm 

What is a simple machine?

• a device that has only one working motor
• a device that makes work easier
• a device that makes more work for a job
• device that is made up of two or more machines