1. a) Beta convinces Alpha to drag their ice-fishing shack to a new location by pulling it with ropes. Alpha applies a force of 150 N [175 ̊] on one rope and Beta applies a force of 175 N [190 ̊] on another rope. What is the net force applied to the shack by Alpha and Beta? Assume the ice is frictionless. Show all work. b)The next day, Alpha decides to move the shack back to its original location. Alpha (having had a nutritious breakfast) is able to pull the 1800 kg shack at a constant velocity with a force of 190 N. Calculate the coefficient of friction between the shack and the ice. Show all work.

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.