Combining Simple Machines
Combining Simple Machines
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What machines are you using to do chores around the garden?
What machines are you using to do chores around the garden?
Charter School of the Dunes has a beautiful new garden! When you head back to school, you may need to help out in the garden. Below are some common garden chores.
Charter School of the Dunes has a beautiful new garden! When you head back to school, you may need to help out in the garden. Below are some common garden chores.
Read the description of your chores, and use the clues to determine what combination of simple machines you are using to accomplish each chore. Check your answers in the pulldown boxes!
Read the description of your chores, and use the clues to determine what combination of simple machines you are using to accomplish each chore. Check your answers in the pulldown boxes!
Chore #1
Chore #1
In order to put a heavy bag of potting soil into a cart so it is easier to move, you build the system on the left to lift the bag up and down without hurting your back.
In order to put a heavy bag of potting soil into a cart so it is easier to move, you build the system on the left to lift the bag up and down without hurting your back.
Object 1 spins in place
Object 2 moves on the rope
Object 3 is the bag of soil
Object 1 spins in place
Object 2 moves on the rope
Object 3 is the bag of soil
What We Know:
What We Know:
It is designed to make the effort less than half the weight of a load.
There are ropes that move over wheels, allowing the load to move up and down.
It is designed to make the effort less than half the weight of a load.
There are ropes that move over wheels, allowing the load to move up and down.
What is Machine 1?
What is Machine 1?
Pulley
Pulley
What is Machine 2?
What is Machine 2?
Pulley
Pulley
Two pulleys on one track is called a combination pulley.
Two pulleys on one track is called a combination pulley.
Chore #2
Chore #2
You've used your combined simple machines (creating a compound machine) to load the soil into a wheel barrow. The wheelbarrow only has one wheel, so in order to make it move, you need to pick up one end and push forward.
You've used your combined simple machines (creating a compound machine) to load the soil into a wheel barrow. The wheelbarrow only has one wheel, so in order to make it move, you need to pick up one end and push forward.
The wheelbarrow allows you to move the soil far distances with less effort.
The wheelbarrow allows you to move the soil far distances with less effort.
What We Know:
What We Know:
Wheelbarrows have one or two front wheels.
Wheelbarrows have one or two front wheels.
What is Machine 1?
What is Machine 1?
Lever
Lever
What is Machine 2?
What is Machine 2?
Wheel and Axle
Wheel and Axle
Good work!
Good work!
The combination of a wheel & axle and lever makes a wheelbarrow able to move weight far distances with less work!
The combination of a wheel & axle and lever makes a wheelbarrow able to move weight far distances with less work!
Chore #3
Chore #3
After moving the wheelbarrow out to the garden, you use a pair of shears (garden scissors) to cut away all the old brush and invasive species to add your soil.
After moving the wheelbarrow out to the garden, you use a pair of shears (garden scissors) to cut away all the old brush and invasive species to add your soil.
What We Know:
What We Know:
Shears have a thin edge called the blade that lets it get between to surfaces.
Shears have a thin edge called the blade that lets it get between to surfaces.
Shears pivot on a hinge that holds the two blades together.
Shears pivot on a hinge that holds the two blades together.
Shears have a fulcrum.
Shears have a fulcrum.
What is Machine 1?
What is Machine 1?
Lever
Lever
What is Machine 2?
What is Machine 2?
Wedge
Wedge
Chore #4
Chore #4
You're almost done, you just need water for your garden. The stream is way too far down the hill, so you make a pump.
You're almost done, you just need water for your garden. The stream is way too far down the hill, so you make a pump.
Watch the video on the left to see how your pump works.
Watch the video on the left to see how your pump works.
What We Know:
What We Know:
Machine 1 has a plane that wraps around a central rod.
Machine 1 has a plane that wraps around a central rod.
Machine 2 has a slope the water travels up.
Machine 2 has a slope the water travels up.
Machine 3 has a hand-turned crank.
Machine 3 has a hand-turned crank.
What is Machine 1?
What is Machine 1?
Screw
Screw
What is
Machine 2?
What is
Machine 2?
Inclined Plane
What is Machine 3?
What is Machine 3?
Wheel and Axle
Wheel and Axle
Nice job! The combination of these 3 simple machines decreases the work force needed to do the chores, but only because they work together.
Nice job! The combination of these 3 simple machines decreases the work force needed to do the chores, but only because they work together.
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