Why do you get two different answers even though the stone starts with the same gravitational potential energy in An elevator car is rising at a constant velocity. 

Consider the following statements. 

1. The upward force of the cable is constant. 

II. The kinetic energy of the elevator is constant

III. The gravitational potential energy of the elevator is constant

IV. The acceleration of the elevator is zero V. The kinetic energy plus the potential energy of the elevator is constant. Which of the following statements is correct?  All five statements are true.

• Only statements II and V are true. 
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• Only statements I, II, and IV are true. 
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• Only statements IV and V are truc. 
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• Only statements I, II, and III are true.