A 100 kilogram person acquires a velocity of 15 meters per second down a ski slope. What is the skier's kinetic energy? A) 11,250 B)22,5000 C)115 Joules D)3,500Joules​

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.