Physics????

What I think is so very cool about physics is that every time you find these random rules and equations, then you try them out, they will always prove themselves to you. There is something really comforting about that. This can be shown by all of our experiments that we did in class. When you measure the force of something with one of those springy things then you find the mass of the object and then the acceleration it will equal the same as what you measured.

Example: If you find that the force a car is exerting is equal to 15,000 N with those springy thingys. Then you measure the mass of the car and you find it is 1005 kg. Then find the acceleration (if the car went from 0 to 75 in 5 seconds then it is (75m/s-0m/s) / 5s you get that it equals 15m/s^2) Then we know from Newton's Second Law that Force= mass x acceleration so F= 1005kg x 15m/s^2 = 15,075 N, pretty darn close right?

What I also find to be very interesting about physics is the conservation of energy that before and object is dropped, or thrown, or released all of it's energy is potential but when it is in motion it is a combo and at certain point it is all converted into Kinetic energy and when it hits the ground, or whatever it converts back into potential. It is pretty amazing that when an object is just sitting on a table it has a ton of potential energy.

Example: If a 2 kg vase is sitting on a ledge 1.5 meters off the ground, according to the equation PE=mgh=
 2kg(mass) x 9.8m/s^2(acceleration due to gravity) x 1.5m(height) so PE= 29.4 Joules and that completes fully into KE and then right back to PE, NOTHING is lost. It's crazy!

Sorry if I explained things too much I do it because it helps me understand fully.