Top Ten Applications of Physics

10.  The number tenth application for physics is using it to find out the gravitational potential energy of an object, using the formula PE=mass times gravity times height.  You can use this to figure out how hard something will hit the ground when dropped from a certain height.
9. The number ninth application for physics in the real world is determining the kinetic energy of an object with the formula KE=1/2mv squared.  You can use this to figure out the force something is going to hit you with, or how much energy an object has while it is moving.
8. The eighth application for physics in real life is determining the rotational velocity of a wheel.
The rotational velocity is how many rotations per second a wheel goes, and this is used for things like figuring out how fast a car is moving.
7.  Number seven is using torque.  Torque is Force times a Lever arm, and it is used to leverage your strength to do things that you normally couldn't, such as turning a really stubborn bolt, or cutting through steel with a really big pair of scissors.
6.  Number six, Gravity.  The way to find out the gravatic attraction is between two objects is:
Gravity= g(m1 times m2)/d^2.  We use this to figure out how much attraction is between satellites and earth, and gravity itself binds the universe together.
5.  Number 5 is centripetal force.  Centripetal force is the thing that causes you to be forced up against the side of a car that is spinning in circles.  You use it every time you wash your clothes, because the spinning motion of the washing machine causes the water to force itself out of the turbine, letting your clothes get spun dry(er).
4.  Electricity!  Without electricity we would not have any of our wonderful technology that we use today.  Electricity is a current, and current is voltage/resistance, which is shown by Ohm's law.
3. Circuits are methods of moving electricity from one place to another.  They have to be a completed loop, and you can turn the flow of electricity on and off by breaking the circuit.
2. Magnetism.  Magnetism is a product of aligned domains in ferromagnetic materials.  Domains get aligned when either subjected to an aligned magnetic field, or getting hit with something while exposed to a very weak magnetic field (such as the Earth's field).
1.  Number one is generators.  Generators are ways of producing electricity by moving a magnet across coils of conductive wire.  You input force, and out comes electricity.  This is the best way to produce electricity.