<Moderator's note: Moved from a technical forum and thus no template.> A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface. 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) Calculate the total energy expended in the acceleration. (b) Plot a graph of the kinetic energy of the mass against time. (c) Plot a graph of the kinetic energy of the mass against distance. Work done so far: 1. (a) 80 x 5= 400J 1 (b) a= 2d/t^2 a=(2x5)/0.92^2 a=11.8147448 a=11.81 m/s^-2 v=at v=11.8147448 x 0.932 v=10.86956522 KE=1/2m(at)2 KE=0.5 x 6(10.86956522)^2 KE=354.4423442 J 1 (c) KE=1/2m(2ad) KE=0.5 x 6(2 x 11.8147448 x 5 KE=354.442344 J My main questions are, should I expect the same answers for both questions? seems a little odd to me. Also, I'm completely stumped on the graphs, how to start them, how to plot them etc. Any help is greatly appreciated!!