PHYS 1010Q Lecture Notes - Lecture 7: Escape Velocity
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PHYS 1010Q Full Course Notes
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You throw a ball up into the air with an initial velocity of 20m/s. How long until the ball is coming back down with a velocity of 10m/s? (we are making down the positive direction). An isolated object conserves mechanical energy and when something is not isolated (some outside force acts upon it) it has kinetic energy. When you are going down a big hill on a rollercoaster, you have kinetic energy since you are moving. When there is the potential for an object to have energy. When you are at the top of a roller coaster about to go down a big hill, you have potential energy. W = f d gm h. Mv 2 top + mgh top = mv 2 bottom + mgh bottom. A force on that object through a distance. The component of the force that is along the direction that it moves.