Report

PAGE 1! Fancy Title Name Date Class Period PAGE 2! • One model of tennis ball launcher has advertis ed that it is capable of imparting 15,000 J of kinetic energy to a 0.8 kg ball initially at rest. • A student carefully measures the compression of the spring to be 0.20 m. • What is the elastic energy stored in spring? • What is the elastic energy stored in spring? • PE1 + KE1 = PE2 + KE2 • They will be equal! • KE = 15,000 J • What is the value of the spring constant for the tennis ball launcher according to the data provided? • Force = F = kx F = load applied on the spring = mg m = 0.8 kg g = 9.8 m/sec^2 • k = spring constant x = 0.20 m • What is the value of the spring constant for the tennis ball launcher according to the data provided? • PE = ½ kx2 rearrange for: k = PE / (½ x2 ) • k = 15,000 / (½ 0.20 2 ) • k = 15,000 / (½ 0.04 ) • k = 15,000 / (0.02) = 750,000 N/m PAGE 3! • Write a new problem and solve it, using the same equation as #1 & #4 on the 6 Question Mini Sheet Assigned yesterday (12/04/14) PAGE 4! • Record the IMPORTANT information in Questions #2 (mountain runners) on this Mini Book Page PAGE 5! • Record the IMPORTANT information in Questions #3 (roller coaster) on this Mini Book Page. This information will account for two separate questions on your exam. PAGE 6! • Create a new problem and solve using the equation for Work PAGE 7! • Create a new problem and solve using the equation for Power PAGE 8! • Energy can be neither created nor destroyed, but can change form, for instance chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite. • Provide a new example, with a diagram, of how energy can change form.