block having a mass m is pressed against a wall by a hand excrting a force f inclined at an angl

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Question

A block having a mass m is pressed against a wall by a hand exerting a force F inclined at an angle Î¸ to the wall, as shown. The coefficient of static friction is Î¼. We shall investigate the question of how large the force F must be in order to keep the block from sliding along the wall. (a) Find the smallest value of F that will keep the block from sliding downwards. (b) Find the largest value of F that will keep the block from sliding upwards. Show that if Î¼ is greater than cotÎ¸, then no matter how strong the force is, the block will not slide upwards.

          A block having a mass m is pressed against a wall by a hand exerting a force F inclined at an angle Î¸ to the wall, as shown. The coefficient of static friction is Î¼. We shall investigate the question of how large the force F must be in order to keep the block from sliding along the wall.

(a) Find the smallest value of F that will keep the block from sliding downwards.
(b) Find the largest value of F that will keep the block from sliding upwards.
Show that if Î¼ is greater than cotÎ¸, then no matter how strong the force is, the block will not slide upwards.

block having a mass m is pressed against a wall by a hand excrting a force f inclined at an angle 0 to the wall as shown tbe coefficient of static friction is of how we shall investigate the 72135

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