1. a 1 kg hockey puck is moving at 10 m/s across the ice. at the other end of the ice rink, its speed is measured at 9.2 m/s. if the puck traveled 60
m, how much friction force acted on the puck? (assume the friction force was constant the whole time).

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?