F15–3. the motor exerts a force of f = (20t 2 ) n on the cable, where t is in seconds. determine the speed of the 25-kg crate when t = 4 s. the coefficients of static and kinetic friction between the crate and the plane are ms = 0.3 and mk = 0.25, respectively

Aboat travels at 15 m/s in a direction 45° east of north. the boat then turns and travels at 18 m/s in a direction 5° north of east. what is the magnitude of the boat's resultant velocity? round your answer to the nearest whole number. /s what is the direction of the boat's resultant velocity? round your answer to the nearest whole degree. ° north of east