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A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface, as shown in Figure 5. The mass is initially at rest and covers a distance of 5 m in 0.92 s under the action of the force. Assuming there are no energy losses due to air resistance and therefore that the acceleration is constant (a) (b) (c) (d) Calculate the total energy expended in the acceleration. Plot a graph of the kinetic energy of the mass against time. Plot a graph of the kinetic energy of the mass against distance. Calculate the coefficient of friction between the mass and the surface. Start 1 092s Figure 5 A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface, as shown in Figure 5. The mass is initially at rest and covers a distance of 5 m in 0.92 s under the action of the force. Assuming there are no energy losses due to air resistance and therefore that the acceleration is constant (a) (b) (c) (d) Calculate the total energy expended in the acceleration. Plot a graph of the kinetic energy of the mass against time. Plot a graph of the kinetic energy of the mass against distance. Calculate the coefficient of friction between the mass and the surface. Start 1 092s Figure 5
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