A398-kg boat is sailing 14.0° north of east at a speed of 1.50 m/s. 23.0 s later, it is sailing 33.0° north of east at a speed of 4.40 m/s. during this time, three forces act on the boat: a 32.8-n force directed 14.0° north of east (due to an auxiliary engine), a 20.5-n force directed 14.0° south of west (resistance due to the water), and (due to the wind). find the (a) the magnitude and (b) direction of the force . express the direction as an angle with respect to due east.

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600