Which factor increases as the effiency of a machine increases

1. The efficiency of the induction increases when the mechanical load increases because as the motors load increases, its slip increases, and the rotor speed falls. Since the rotor speed is slower, there is more relative motion between the rotor and the stator magnetic fields in the machine.

Explanation:

the pull of gravity on the rocket decreases

the answer is 3.1 his answer is wrong mines is right