Help me with this question ​

Explanation:

Let's set the x-axis to be parallel to the and positive up the plane. Likewise, the y-axis will be positive upwards and perpendicular to the plane. As the problem stated, we are going to assume that m1 will move downwards so its acceleration is negative while m2 moves up so its acceleration is positive. There are two weight components pointing down the plane, and and two others pointing up the plane, the two tensions T along the strings. There is a normal force N pointing up from the plane and two pointing down, and . Now let's apply Newton's 2nd law to this problem:

x-axis:

y-axis:

Use Eqn 1 to solve for T,

Substitute this expression for T into Eqn 2,

Collecting all similar terms, we get

or

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