Outside the space shuttle, you and a friend pull on two ropes to dock a satellite whose mass is 900 kg. the satellite is initially at position < 3.2, -1.5, 2.2> m and has a speed of 4 m/s. you exert a force < -400, 500, 350> n. when the satellite reaches the position < 2.0, 2.4, 4.0> m, its speed is 5.56 m/s. how much work did your friend do?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?