Un bloque de masa m se remolca sobre una superficie como lo muestra la figura. El coeficiente de fricción cinética entre el bloque y la superficie es∶ y la tensión en la cuerda es: T. La aceleración del bloque es: a) ⃗ = . B) ⃗ = . C) ⃗ = . + d) ⃗ = .

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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.