Why might a scientist change a hypothesis

a scientist might change their hypothesis so that it is closer to the actual observation.

Explanation:

Scientists change their hypothesis all the time. Remember, a hypothesis is a statement of what you think will happen before you conduct your experiment. If a scientist made a prediction that was totally off when he first started testing it, they can change it based on their new evidence. Scientists always want to see how close their original hypothesis was to the actual observations.

i don't understand. explain it clearly

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