Welcome back minions. Instructions and warm-up on the board.

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Welcome back minions. Instructions and warm-up on the board.

Transcript of Welcome back minions. Instructions and warm-up on the board.

Page 1: Welcome back minions. Instructions and warm-up on the board.

Welcome back minions.

Instructions and warm-up on the board.

Page 2: Welcome back minions. Instructions and warm-up on the board.

QUIZ!!!

• Clear your desk.• Get out a sheet of paper.• Put your First and Last name on the top, along

with the period.• Number your paper 1 to 10.• Pay attention!!!

Page 3: Welcome back minions. Instructions and warm-up on the board.

#1

This machine is a flat, sloped surface. It is usually used to lift an object.

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#2

This machine is thick on one end and tapers to a smaller edge at the other end. This is usually

used for separating.

Page 5: Welcome back minions. Instructions and warm-up on the board.

#3

This machine is an inclined plane wrapped around a cylinder.

Page 6: Welcome back minions. Instructions and warm-up on the board.

#4

This machine is a rigid bar that is free to pivot or rotate at a fixed point.

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#5

Which class lever is this?

Page 8: Welcome back minions. Instructions and warm-up on the board.

#6

Which class lever is this?

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#7

Which class lever is this?

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#8 and #9

WORK = _________ x __________

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#10

True or False

A Screwdriver can be used as a first class lever, a third class lever, a wedge, and a wheel and

axle.

Page 12: Welcome back minions. Instructions and warm-up on the board.

Wheel and Axle

Where have you seen a wheel and axle before?

What is a wheel and axle?

Wheel and Axle:A machine made of two circular cylindrical objects fastened together that rotate about a common axis.

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Good question yesterday…

What would the tool, the screwdriver, be classified as in reference to a simple machine?

Answer: Wheel and Axle

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Mechanical advantage…

• The greater the ratio between the wheel and axle, the greater the mechanical advantage.

• Think of the wheels of the balloon racer!

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Pulley

Where have you seen a pulley before?

What is a pulley?

Pulley:A simple machine made of a grooved wheel with a rope or cable wrapped around it.

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How it works…

• You pull on one end of the rope.

• The other end is attached to the load.

• It changes the input force in two ways– Decrease input force– Change direction of

force.

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Types of pulleys

• 3 Types of Pulleys:

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Mechanical advantage

• Pulley’s mechanical advantage is equal to the number of sections that support the load.

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Simple machines in the body…

• Some of you wondered about this…

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Compound machines…

• Compound machine:– A machine that utilizes two or more simple

machines.

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Homework

• Give me 3 examples of a compound machine.– Must have a picture of the compound machine.– Point out and identify the parts that are simple

machines.