In a practical machine, the power output is smaller than the power input. considering the law of energy conservation, what can explain this occurrence? a. some of the energy going into the machine is being destroyed. b. some of the energy is used to combat friction, and thus is transformed from mechanical energy to heat. c. some of the energy going into the machine is being created at a quicker rate than the energy coming out is being destroyed. d. some of the energy coming out of the machine is being destroyed.

i think it is b because of what i was and am being taught

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3