What is the resultant of a pair of one pound forces at right angles to each other?

Explanation:

Given that there are two force of 1 pound each at right angles to each other.

The from the vector law of addition:

where:

resultant force

be the two of the forces to be added.

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

conservation of mass

mass before something happens = mass afterwards