Mechanical energy is when there is no forces causing an object to lose energy a. increased b. conversed c. decreased or d. doubled

B. Conserved

Explanation:

Mechanical energy is equal to the sum of potential energy and kinetic energy of an object:

where U is the potential energy and K the kinetic energy.

When there are no resistive forces such as friction or air resistance, the mechanical energy of the object is conserved. As a result, the energy in such situation is converted from potential energy into kinetic energy (or viceversa). An example of this application is the free fall of an object: when the object is initially released from the top of a building, it has potential energy (U) but not kinetic energy since it starts from rest; as it falls down, all this potential energy is converted into kinetic energy (K), because its speed increases, and the total energy (E) is conserved.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

inverse v=i*r

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