You are dragging your 25-kg backpack with a 200-N force along the ground at an angle of 50° above horizontal. The frictional force is 100 N. (a) What is the normal force? (b) What is the coefficient of friction between your backpack and the floor? (c) What is the acceleration of your backpack?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?