Unit Three Resource

For tides, I found a helpful website. It was very helpful, but the most helpful part was the animated Gif that I found midway through the page.  It helps to show the the rotation of the moon and how that effects the tide. The link is posted below!

Tide Resource

Why do we have tides?

Tides occur as a result of the difference of force between the moon and the different sides of the earth.  We know this because of the Universal Gravitational Law, which states the larger the Distance, the smaller the force.  The smaller the distance, the greater the force.  

On side A of the Earth, labeled above, there is a small distance from the moon, and thus a large force.  Side B has a longer distance from the moon, making the force smaller.  Sides A & B experience different forces. 

From the moon to Side A, the net force is towards the moon, while on Side B, the net force is away from the moon.  

Boca Grande Tides

Tide Chart

The best chart on the page is midway through the website.

At 8:35, Boca Grande is in transition from High to Low tide.  The moon is just about a half-moon.  I know this because the cart has a convenient moon chart next to it.  

Newton's 3rd Law Resource

Newton's Third Law states that for every
action there is an equal and opposite reaction.

To better my understanding of these "action/reaction pairs", I turned to the ever-helpful www.physicsclassroom.com and found this diagram.

The website asked for us to identify at least 6 Action/Reaction pairs.

1. Tractor pushes ground to the right, ground pushes tractor to the left
2.Elephant pushes ground to the the right, ground pushes elephant to the left
3. Tractor pulls elephant to the left, elephant pulls tractor to the right
4. Man pulls tractor to the right, tractor pulls man to the right
5. Man pulls elephant to the left, elephant pulls man to the right.
6. Man pulls left rope to the right, left rope pulls man to the left
7.  Man pulls right rope to the left, right rope pulls man to the right

This example, along with many other exercises on the site, provide practice with stating Action/Reaction pairs.  Practice makes perfect, making this resource ideal for this section.

For full access to the website, check either one of these helpful pages:

Newton's Third Law

Identifying Action and Reaction Force Pairs