Q1. Two ocean liners, each with a mass of 40,000 metric tons, are moving on parallel courses, 92 m apart. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction? Treat the ships as particles.
Q2. A transverse wave on a cord is given by y(x, t) = 0.12 sin(3.0 x - 15.0 t), where Y, and x are in meters and t is in second. At t = 0.20 s, what are the displacement and velocity of the point on the cord where x = 0.60 m?