Based on the law of conservation of energy, which statement is false?
a. energy is lost when machines don't work right.
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b. we can't add more energy to the universe.
c. we can't destroy energy that exists in the universe.
d. energy changes from one form to another.

From the conservation of energy...

We can say that the total energy contained in the universe must be constant. No energy can be added or removed without that change being balanced out by an energy gain/loss elsewhere. This makes choices B and C true.

To balance out these changes in energy, it must change forms (like a planet orbiting a star exchanges some of its potential energy for kinetic energy and vice versa). This makes choice D true.

By process of elimination, the answer is choice A.

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

where is the