Ineed a better understanding of this.. and you!

solution,

in this question we have given,

power of motor=150watts

time=8s,

force=15n

we know that,

power=

therefore,

true because a physical change is just a change in appearance

work is a product of force and displacement. the choice with displacement but in a different direction is not right as force not acting along the displacement will not generate work.

so the answer is force in the same direction as the displacement vector and the motion.

each hour 430 quintillion joules of energy from the sun hits the earth.

in a year it is very hard to determine because of the night and different light levels.