Fig. 9.1
(i) On Fig. 9.1, mark the north and south poles of the magnet, using the letters N and S.
[2]
(ii) A small piece of unmagnetised iron is placed at A.
What, if anything, happens to it?
(iii)
A small piece of positively charged plastic is placed at B.
What, if anything, happens to it?

Okay let say from the diagram you have more force come in from the B point of the magnet and release out from A point of the magnet. so lets say north is always the attractive spot and south is your releasing spot.

Explanation:

meaning from magnet the north pole attracts objects and the south pole repeal object.

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