Q1. Wire carries a stable current of 2.60 A. A straight section of the wire is 0.750 m long and lies along the x axis within the uniform magnetic field, = 2.00 T. If the current is in the positive x direction, what is the magnetic force on the section of wire?
Q2. A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the hill?