swimming POOL

Today, I remembered that last winter my friends and I went to play pool at Hawaiian Brians after a a tough wrestling tournament. Since it was late there was hardly anyone else there. Thinking of this day reminded me of physics and the concept of momentum we are learning about. At first before I hit the cue ball, it has a momentum of 0kgm/s and a velocity of 0m/s. Once i strike the cue ball, the ball will gain momentum and velocity. In a bouncy or elastic collision momentum and kinetic energy is conserved. P1=Pf (initial momentum = final momentum). KE1=KEf (initial kinetic energy = final kinetic energy). Therefore, after the cue ball hits the balls and they all go off in different directions, all of their momentum combined should add up to the momentum of the cue ball when it them. Also, their kinetic energies should add up to the kinetic energy of the cue ball.

i dont like Motorola

Before I started doing homework in my room, I placed my cell phone on the desk. I later noticed that my cell phone on the desk related to physics. My cell phone has potential energy since it is at an elevated position (my desk). Since the cell phone is not moving it has zero kinetic energy. However, if the phone was to move off the desk and fall to the ground, the kinetic energy will increase. Potential energy = mgh which is mass (kg) times gravity (9.8m/s^2) times height (m). Kinetic energy = 1/2mv^2 (v = velocity m/s). Even though the potential energy will change as it falls to the carpet, the total energy (potential energy + kinetic energy) will always remain the same. Hopefully, my dad will let me get a new phone that is not a Motorola. When I had this phone at KMC for senior camp, mine was the only one that had no bars. This phone is always giving me problems. Grr!