Teacher Pack Boat Competition (KS 3 / 4)

2 Why are there different shapes of boats?

3 What is the use of this flatboat for these settlers?

4 How is a modern barge like the flatboat?

5 What are the hull characteristics of a canoe?

6 Destroyers have similar hull forms as canoes

7 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

8 How about the hull of an aircraft carrier?

9 Buoyancy Force Water displaced Water displaced Force Pushing Down (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

10 Demonstration: Show that the lemon floats because it displaces its weight in water Materials Needed: 1.Transparent, round container 2.Water 3.Lemon 4.Grease pencil 5.Scale for weighing 6.Rule Initial Height Final Height Displacement with a Lemon

11 Why does it float???? ½ KM long Made from tons of metal tons when fully loaded Too big for English Channel The Knock Nevis

12 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

Lbs 400 Lbs Board = 20 Lbs Support (fulcrum) can hold 400 Lbs 380 lbs 20 lbs lbs C G CG = Center of Gravity (It is the point on an object where it is balanced) A See-Saw in Trim

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

15 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

16 Starboard Forward Aft Port Directions on a Ship

17 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?