if a boat and its riders have a mass of 800 kg and the boat drifts in at 1.4 m/s how much work does sam do to stop it?

If a boat weighs 800 kg with its passengers on board and drifts in at 1.4 m/s. Sam's work to stop it is -1152J.Kinetic energy of K.E= 1/2 mv²Work energy W= 1/2mv₁²-1/2mv₂²                           =1/2m(v₁²-v₂²)                            =1/2*900(0-1.6)                            =-1152JThe difference between the boat's initial and final kinetic energies is equal to the change in the boat's kinetic energy.Due to the boat coming to a complete stop after Sam stopped it, the final speed of the boat is equal to zero.The change in the boat's kinetic energy is equal to the work Sam did to stop it, according to the work energy theorem. As a result, Sam's work can be computed by determining the change in the boat's kinetic energy. Sam's work on the boat is represented by the negative number in the final work done answer.Learn more about work here:https://brainly.com/question/18094932#SPJ4