PHY 113 Midterm: P113 06 Exam 2
Document Summary
Please read the problems carefully and answer them in the space provided. Write on the back of the page, if necessary. Partial credit will be given unless specified otherwise. The gain in her potential energy is u. If she runs up the same stairs with twice the speed, what is her gain in potential energy: u, 2u, (1/4)u, 4u, (1/2) u. If she runs up the same stairs with twice the speed, what power does she expend: p, 2p, (1/4)p, 4p, (1/2) p. Evaluate the dot product (scalar product), a b, between the two vectors. In some parts of the world people celebrate by shooting guns into the air. Briefly explain, using concepts we have discussed in class, why this is a bad idea. Alex mcstudley offers polly puritan a ride to the big game. He"s very happy when he sees that polly forgets to buckle her seatbelt.
