I'LL MARK BRAINLIEST Which scientific law describes the observation that energy cannot be created or destroyed? (3 points)

a
Law of universal gravitation

b
Law of conservation of energy

c
Newton's first law of motion

d
Newton's third law of motion

B law of conversation of energy

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside.

what question you dont ask a question

explanation:

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards