Question

1. choose the best answer.

the sum of an objects kinetic and potential energy is its

vector
thermal energy
static friction
gravitational force

Explanation:

The sum of an object's kinetic and potential energy is its mechanical energy. However, among the given options, thermal energy is related to the internal energy of a system (which can be thought of in some contexts as a form of energy that might be part of the total energy picture when considering more complex systems, though the direct sum of kinetic and potential is mechanical. But since thermal energy is the only energy - related option here (gravitational force and static friction are forces, vector is a quantity type), if we assume a more general energy concept in a basic sense.

Answer:

thermal energy