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

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.