What is a light year?
a. the time it takes for light to reach earth from the sun
b. the distance light travels in one year
c. the time it takes for light to travel around the sun
d. the distance light can travel in a year before it burns out

The answer is B. A light year isn't a measurement of time. A light year measures the distance light travels in a year. I hope this helped! :-)

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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