A package of 5 kg is left to fall from a helicopter. When is 100 m above the ground the speed of the package is 15 m/s. Select all that apply: O The gravitational potential energy is greater than the kinetic energy. O The package has only kinetic energy. O The package has kinetic energy and gravitational potential energy. O The kinetic energy of the package is greater than 600 J As it is falling the gravitational potential energy increases The kinetic energy of the package is less than 600 J O As it is falling the gravitational potential energy decreases. The mechanical energy of the package is about 5500 JA 1320-kg elevator car is lifted by its cable over 25.0 m at constant speed; assuming friction is negligible select all that apply: O If the speed is constant the net force acting on the elevator is zero. The force of gravity of the elevator is 12936 N. The force acting on the cable is has the same magnitude as the force of gravity of the elevator. The force of gravity of the elevator is 12936 J. If the speed is constant the net work done on the elevator cannot be calculated O The work done by the force of gravity is a positive work O The work done on the elevator by its cable is 3.2x104 J O The work done by the force of gravity is a negative work