You are a passenger on a jetliner that is flying at a constant velocity. you get up from your seat and walk toward the front of the plane. because of this action, your forward momentum increases. does the forward momentum of the plane itself decrease, remain the same, or increase?

Decreases

Explanation:

Assuming the plane and the passenger are in the same system, the total momentum of the system will remain constant. (i.e. net momentum)

This means that to cancel out the effect of the increase in forward momentum of the passenger, the plane will increase its backward momentum (i.e. reduce its forward momentum).

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