This is our science project. By: Marc Brescia and Ryan Mazurczyk. PERIOD 2.
What is Gravity?
Woah, I'm Floating! This is so awesome! I'm experiencing a different amount of gravity than on Earth.
Ouch, Gravity made the apple fall and hit my head.
What is Friction?
Friction helps make sharp turns and helps me be protective while driving.
Gravity is a force that pulls a body towards the center of Earth. It attracts two masses together. All things in the universe, (EVERYTHING) is pushed/brought toward one another. On Earth, for example, it gives weight to physical objects. It pushes everything on Earth toward the center of the Earth at 1G. That's what goes up, almost always comes down.
Friction + Different Types
It's easy to run through air!
Not much on Earth is stronger than gravity unless you go faster than 25,000 MPH. Otherwise, everything else likes to fall down. Johnny was sitting under a tree and the apple fell and hit him in the head. The force of gravity was stronger than the force the apple used to hang onto the tree, so as a result, it fell downwards, toward the center of the earth. Gravity is affected by the mass and distance of two objects. If the mass is doubled, then the force of gravity is doubled.
What is Elastic Force?
Friction is the resistance between two different surfaces. For example, the driver of the car has a smooth ride because the tires and road have friction where both can move along each other. The driver of the car slams on his brakes and because the wheels stop spinning, the car stops almost immediately because the friction is able to stop the rubber wheels.
Elasticity and Elastic Force
John wears regular shoes which makes it hard to walk on ice. This is because of sliding friction. The ice and shoes have very little friction, so John just slides across the ice. Mike, put the couch on the rug, which holds the couch in place because those two have high static friction. Static friction is the force that keeps an object at rest. Rolling friction makes it easy for a ball to roll across the ground. Finally, fluid friction is the ability to go through air or a liquid.
The ball rolls easy because its round and has rolling friction.
Elastic force is the ability of an object to be stretched and be returned to its original position. Everytime Shawn uses the diving board elastic force is in play. When Shawn jumps on the diving board he applies pressure to the board and the board stretches downwards. The board counteracts his weight by flinging him back up and into the air. The board wabbles for a little bit after Shawn is launched into the air, however, it will eventually return to its initial state.
Different objects have different elasticity. Elasticity is the ability of solid materials to return to their natural shape and size after being deformed. An example is a rubber band which has natural elasticity and can stretch when pulled. Additionally, elastic force is the force on something that is pulled. Elasticity and elastic force are pretty similar, except elastic force is the force exerted and elasticity is the way it forms back. Both work together in this case as the gum is being stretched.
Ahhh. Come on these were new shoes. Why was there gum just laying on the street?