2-25+DREW+new

Today when I walked into class, Mr. Manning had on the board that we would be finishing our energy and roller coasters packet. Then we would be working on another page called K'NEX Roller Coaster Demo. An example problem from the energy and roller coasters packet is this: Frank, a San Francisco hot dog vendor, has fallen alseep on the job. When an earthquake strikes, his 400 kg cart rolls down Nob Hill and reaches point A at a speed of 8 m/s. How fast is the cart going at point B? Complete the chart. The total energy of the cart on point A is 208,800 J. The potential energy of the cart is 196,000 J. The kinetic energy of the cart is 12,800 J. SInce the hill is 50 meters tall then the velocity of the cart on point A must be 8 m/s. The total energy of the cart on point B is 205,800 J. The potential energy of the cart is 117,600 J. The kinetic energy of the cart is 88,200 J. Since the hill is 30 meters tall then the velocity of the cart on point B must be 21 m/s. For the K'NEX Roller Coaster Demo paper, we had to fill in questions that we got answers to earlier in the week during another demonstration. Some example questions on the paper are How much total energy was lost during the ride? What percent of the initial energy was lost? What caused the loss in energy? (List at least 2 reasons!) The first answer is .580 J. The answer to the second question is it was a 58% loss of total energy, and the answer to the third question is sound and heat could be two reasons energy was lost. Our homework was to finish both of these worksheets, and to complete the reading guide for our test that will be on monday. Mr. Manning is the man.