Teacher PackBoat 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

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

10

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

11

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

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

13

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

14

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

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?