Technician A says that the primary and secondary reservoirs are used so the system can be divided into two brake circuits; one supplying the front brakes and the other supplying the rear brakes. Technician B says the primary reservoir normally delivers to the front brakes and the secondary reservoir delivers to the rear brakes. Who is correct ?

Answerboth technicians (a) and (b);

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.