Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. find the magnitude of the frictional force between the person and the wall.

friction force must be equal to the magnitude of weight of the object

Explanation:

When the object is stuck against the wall

then we will have

also we know that

so if the block is at rest and not sliding then in vertical direction the force must be balanced

so here we can say

so friction force must be equal to the magnitude of weight of the object

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

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