Recent content by dragos

Roller Coaster loops! does anybody know why do roller coasters have more of an oval loop then rounded loop? Thankss

v2 so v2 isn't zero in this case. i was supposing that v2 will be 0, when the ball hits the ground. So how would you proceed with this problem further?

A basketball player shoots a ball at an angle of 60 with an initial velocity of 7.0 m/s. The ball was 2.0m above the ground when released and the basket was 3.00m high. How long was the ball in the air? Here is what i did so far: y-axis...

parabolic reflector ic.. but where should i position the parabolic reflector, since i can't do anything to the lamp given in this experiment. -as i understand I am supposed to build some kinda box that will attract as much heat as possible in order to heat the water.

The purpose of this experiment is to construct an energy-collecting apparatus to concentrate as much energy from a provided 250 Watt heat lamp as possible. This energy is to be used to heat a mass of water. (the water will be given at a fixed temperature in a 35 mm film canister). The heat...