1.) What is the kinetic energy of a 45 kg object moving at 13 m/sec? 2.) The kinetic energy of a boat is calculated at 52,000 J. If the boat has a mass of 39,000 kg, with what velocity is it moving? 3.) A 37 N object is lifted to a height of 3 m. What is the potential energy of this object? 4.) A gas in a system has constant pressure. The surroundings around the system lose 62 J of heat and does 474 J of work onto the system. What is the internal energy of the system