A 20.0 kg mystery box rests on a horizontal floor. The coefficient of static friction is us = 0.50 and the coefficient of kinetic friction is uk = 0.30. Determine the force of friction, Ff acting on the box if a horizontal external applied force FA= 75 N is exerted on it.

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Observations show that interstellar clouds can have almost any shape and

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell