Physics

To find the momentum of the object after it has risen 4 meters, we need to calculate its velocity at that point and then use the relationship to determine its momentum.

Identify the forces acting on the object

The upward force .

The downward gravitational force (weight) of the object is:

The air resistance is one-fifth of the object's weight:

Thus, the net upward force is:

Use Newton's Second Law to find acceleration

Using Newton's second law, , we can calculate the acceleration:

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