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The graph below shows the kinetic energy of a cart with respect to time. Use this graph to answer the following questions. KE vs. Time KE (J) 500 450 400 350 300 250 200 150 100 50 0 0 5 10 b.) When is the cart slowing down? From s to S. d.) When is the power positive? From: s to 15 c.) How much work was done from 30 s to 50 s? J S. 20 e.) Calculate the power of the cart at t=6.6 s. W a.) State the time at which the velocity of the cart is zero. If the velocity was never zero then type "never". 25 Time (s) f.) Calculate the power of the cart at t-32.2 s. W 30 35 40 45 50