Astone is dropped from rest from a tall building how fast is the stone moving after 5s

The final velocity is -49.05 meters per second.

Explanation:

Let's use an equation of constant acceleration:

Where a is the acceleration and g is the acceleration caused by gravity.

Since the object is being dropped from rest, .

We're looking for the speed after 5 seconds, so .

So the final velocity is -49.05 meters per second.

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

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