Which of the following is ALWAYS true.
a) An object experiencing a constant negative acceleration has adecreasing momentum.
b) If an object has a constant acceleration, its kinetic energyis changing at a constant rate.
c) If an object has a zero net force acting on it, its kineticenergy is constant.
d) If an object's kinetic energy is constant, there is no netforce acting on it.
e) If an object's kinetic energy is increasing there is apositive net force on it.
