In order to climb a steep hill on a bicycle, a rider shifts to the lowest gear. the lowest gear has the greatest mechanical advantage because it a) requires the least work to climb the hill. b) requires the least force to climb the hill. c) requires the greatest force to climb the hill. d) requires the greatest work to climb the hill.

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

tbh i don't know the answer for this question

c) a core temperature of only ten thousand kelvin