The mechanical energy of an object is equivalent to the sum of its potential and kinetic energy. If the helicopter is grounded, then its mechanical energy will be 20 J. If it is in the air, then its potential energy will be calculated using:P.E = mghAnd then added to the kinetic energy to obtain mechanical energy.
Either A or B. I will do readersherch
I believe D but there is a chance im wrong.. sorry if I am
The theory of behaviorism was developed by the psychologist
