Teacher Pack Boat Competition (KS 3 / 4)
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Transcript of Teacher Pack Boat Competition (KS 3 / 4)
Teacher PackBoat Competition (KS 3 / 4)
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Why are there different shapes of boats?
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What is the use of this flatboat for these settlers?
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How is a modern barge like the flatboat?
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What are the hull characteristics of a canoe?
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Destroyers have similar hull forms as canoes
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Archimedes’ principle indicates that the upward force exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces
WEIGHT
BUOYANCY
Archimedes Principle
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How about the hull of an aircraft carrier?
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BuoyancyForce
Waterdisplaced
Waterdisplaced
ForcePushingDown
(person)Empty
Container
Water
Archimedes’ principle indicates that the upward force exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces
Archimedes’ Principle
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Demonstration: Show that the lemon floats because it displaces its weight in water
Materials Needed:1. Transparent, round container2. Water3. Lemon4. Grease pencil5. Scale for weighing 6. Rule
Initial Height
Final Height
Displacement with a Lemon
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Why does it float????
• ½ KM long
• Made from 250 000 tons of metal
• 500 000 tons when fully loaded
• Too big for English Channel
The Knock Nevis
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Working in groups of no more than 3 in a group, design a boat from the materials at the back of the room.
Your boat must float, no submarines!
Winner is the boat that can carry the most amount of coins.
Plan your design first on paper!
Extension: What boat can sail the fastest?
Design Challenge
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380 Lbs
400 Lbs
Board = 20 Lbs
Support (fulcrum) can hold 400 Lbs
380 lbs20 lbs+
400 lbs
C G
CG = Center of Gravity(It is the point on an object where it is balanced)
A See-Saw in Trim
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100 Lbs
C G
In Trim
100 Lbs
C G
100 Lbs
Back in Trim
100 Lbs
Out of Trim
C G
100 Lbs
Out of Trim
C G
A Canoe in water is like a see saw
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In Trim
50 lbs
C G
Out of Trim
50 lbs
C G
Out of Trim
50
lbs
C G
Back in Trim
50 lbs
C G
50 lbs
A Canoe in water is like a see saw
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Starboard
Forward
Aft
Port
Directions on a Ship
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In ancient history, ships did not have a rudder in the center of the aft end of the ship. The rudder was actually a paddle which was placed in the water over the side at the aft end of the boat.
If you look at this two-mast vessel you can see a steersman in the back with a paddle over one side. That paddle is a "steer board," which was used to steer and some of these were fixed so it could turn but not be lifted.
The side of the ship with the "steer board" is the starboard side.
To prevent damage to the steer board, the other side was the side that went alongside the dock when they were in port. Hence, it was the port side (it used to be called the larboard side but this was confused with starboard in a storm when the captain shouted orders)
Steer board
What is the history of Port and Starboard?