Question

You are pushing on a heavy desk with a force of 65 N the desk does not slide the force of friction between the desk and the floor is 65 N true or false

Answer 1

When an object does not move even on pushing , static frictional force acts on in opposite direction of the applied force to stop the object from moving. static frictional force is a self adjusting force and it adjust its value according to the applied force if the applied force is smaller than the maximum value of static frictional force. The object starts moving once the applied force on it becomes greater than the maximum static frictional force.  hence the statement is true.