Question

2) A boy, is pulling a toy train of mass 500 grams along the x-axis in such a way that the position, x (m) of the train as a function of time, t (seconds) is given by x = 4t³ - t² + 3. a) If the force applied by the boy is in the direction of the displacement calculate the work done by the boy during the first two seconds. b) Determine the average power expended by the boy in 2 seconds. c) What is the power at time t = 1 second? d) If the kinetic energy of the particle, moving under the action of the force, remains constant with the passage of time what is the angle between the force and the velocity? 5 points

Answer 1

Answer:

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