Penguins are adapted to survive in cold conditions. The adaptations help them to maintain a constant body temperature of 39 °C. Penguins also crowd together in groups of many penguins. (a) A student wants to investigate how the temperature of a penguin is affected when they crowd together in groups. She uses this apparatus. Each test tube represents a penguin.

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

answerscientific theory;