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Title: A Spoonfull of Physics
Category: Contrived
Topic: Gravity and force normal
Description: There are many forces happening in this photo, all off them balancing each other out. In order to more easily explain this photo I electronically color coded the spoons. Ok to start off the two blue spoons are held in the cup because the rim of the cup acts inward towns the center of the cup, therefore keeping the spoons from falling down while in the cup. The blue spoons hold up the green spoon, the blue spoons act as force normal pushing up against the green spoon, while the green spoon is pulled down by the force of gravity, this balances the forces between the blue and green spoons. Then the orange spoon is balanced on the green spoon. The orange spoon then has the red spoons balanced on both sides of it. The two red spoons act down towards the ground while the orange spoon, since it is balanced on the green spoon as well, acts up. All these forces cancel out making the structure able to stay up.
Title: Seesaw
Category: ContrivedTopic: Gravity and force Normal
Description: This picture can be explained with simple physics. First off, the rock lays on the table, the rock being pulled down by gravity and the table pushing up on the rock. This keeps the rock from falling through the table or flying up. Then a ruler is placed on the rock with a hackysack on each end. The hackysacks are around the same mass so they balance out the ruler when placed on both ends. The two hackysacks are pulled down by gravity while the ruler holds them up, then the rock holds up the ruler. So if I were to carefully pull one side down, when I let go it would return to its previous state. This is also how a seesaw works. Two people get on each end and one person pushes up off the ground, which brings the other person down. If they were to not push up agian the seesaw would return to its horizontal state.
Title: Living on the edge
Category: Contrived
Topic: Tension and force normal
Description: In this picture a boot is being held on a ledge by a piece of string. That string is experinceing a force called tension. This tension is created by the shoe naturally wanting to fall off the ledge, but since the string is tied to it and the ledge, it cannot fall down. The force normal also keeps the shoe from falling down through the ledge. Looking at the picture, the force of the tension is pulling the shoe to the left, and the force of normal and gravity are canceling each other out. Since the shoe is not completely over the edge it cannot fall because force normal is still acting on it. If I were to remove the string the shoe would fall over cause gravity would overcome the force normal towards the front of the shoe. If the ledge did not exist the boot would swing down.
Title: Hanging by a branch
Category: Natural
Topic: Tenson and gravity
Description: In this picture there is a plant that has begun to lean but hangs onto the fence by its branches. The plant has begun to lean because of gravity. The plant grew more leaves and flowers away from the fence and towards the sunlight. Because one side has become more heavy gravity is acting more on that side and is pulling it down. In order to avoid completely falling over the plant has grown vines around the fence to keep itself up. When the plant leans the vines holding onto the fence experience tension. Gravity is pulling the tree down while tension pulls it up. If the tension was not there the plant would fall to the ground. Even with the tension the branches bend towards the ground because of all the weight on the end of each branch.
Title: hanging by a rope
Category: Contrived
Topic: tension and gravity
Description: In this photo there are several glass covered lamps being held up by ropes. This shows a very simple physics topic. there are two forces acting on this, gravity and tension. Gravity acts down, pulling the lamp towards the ground. While tension pulls the lamp up. These two forces keep the lamps from flying up or falling down. The string is pulling upwards on the lamp while gravity pulls downward on the lamp. This balances the two forces. These glass coverings for the lamps are very heavy so the force of tension has to be very big in order to counteract the force of gravity.
