When potential energy and kinetic energy are added, it creates:
a. chemical energy
c. mechanical energy
b. thermal energy
d. electromagnetic energy?

c. Mechanical energy

Explanation:

Mechanical energy is the sum of potential energy and kinetic energy.

Mechanical energy is the energy that an object has because of its movement velocity or its specific position. And this energy can do a certain Work.

If we had an object with certain mechanical energy and this object is in an ideal environment, that is a place where there are no other acting forces to take energy from the object, then the energy will always be constant.

But if we have the object in a place that there are other conditions then we start losing kinetic energy and gaining potential energy. Because mechanical energy is constant, we never lose or gain mechanical energy, we only lose or gain potential or kinetic energy.

And this is equal to the equation:

Ek + Ep = Mechanical Energy.

If the kinetic energy goes down then the potential energy has to go up to keep with the same relation.

mass and volume are the answers you are looking for

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.