Question

How would you calculate an object’s mechanical energy? a. Add its kinetic and potential energies. b. Multiply its kinetic and potential energies. c. Subtract its kinetic energy from its potential energy. d. Subtract its potential energy from its kinetic energy.

Answer 1

a. Add it's Kinetic and Potential energies

Answer 2

We know that:
EM=Ek+Epg
So basically you just sum the kinetic plus the potential energy and that´s it. (a)