Assume there are two forces pushing a ball in the same direction: the first force Is 12 N and the second force is 8 N. What is the total force being exerted on the ball 10N
20N
15N
5N

20 N

Explanation:

To calculate net force we find the sum of all the forces being exerted on an object.

So, we add 12 N and 8 N, and that results in 20 N becuase they were both facing in the same direction

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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