20. A crate of weigh W = 860 N on a horizontal surface is pulled by a cord at an angle of 37° above the horizontal. If the kirfetic frictional coefficient between the crate and surface is u = 0.1, what should be the required force (in N) to pull the crate at constant velocity? 37 3 A) 50 D) 200 B) 100 E) 250 4. 800 C) 150

20. A crate of weigh W = 860 N on a horizontal surface is pulled by a cord at an angle of 37° above the horizontal. If the kirfetic frictional coefficient between the crate and surface is u = 0.1, what should be the required force (in N) to pull the crate at constant velocity? 37 3 A) 50 D) 200 B) 100 E) 250 4. 800 C) 150