A person in a kayak starts paddling, and it accelerates from 0 to 0.65 m/s in a distance of 0.40 m. If the combined mass of the person and the kayak is 75 kg, what is the magnitude of the net force acting on the kayak?

Question

Pearl · Answer

Answer:         Magnitude of the net force acting on the kayak = 39.61 N         Explanation:         Considering motion of kayak:-         Initial velocity, u =  0 m/s         Distance , s = 0.40 m         Final velocity, v = 0.65 m/s         We have equation of motion v² = u² + 2as         Substituting            v² = u² + 2as             0.65² = 0² + 2 x a x 0.4             a = 0.53 m/s²         We have force, F  = ma         Mass, m = 75 kg              F  = ma = 75 x 0.53 = 39.61 N         Magnitude of the net force acting on the kayak = 39.61 N

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