Q1. A 48-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 64 A and experiences a magnetic force of 0.16 N. Find out the magnitude of the earth's magnetic field at the location of the wire, assume the field makes an angle of 68.0° with respect to the wire.
Q2. A 4.40 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. it gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of its vertical axis is set by vs = 6 m/s. What is the coefficient of kinetic friction between block and floor?