A 2.78 kg cart moving along a horizontal track in the positive x-direction has a changing force exerted on it. The force exerted on the cart is plotted in the graph shown. Note that the friction between the cart and track is negligible. 1) Calculate the work done in joules on the cart when it has reached a displacement of 20.2 cm along the track. 2) If the cart is moving with a speed of 2.86 m/s when it has reached a displacement of 20.2 cm along the track, calculate how fast (in m/s) the cart was moving at the start (at displacement = 0)

A 2.78 kg cart moving along a horizontal track in the positive x-direction has a changing force exerted on it. The force exerted on the cart is plotted in the graph shown. Note that the friction between the cart and track is negligible. 1) Calculate the work done in joules on the cart when it has reached a displacement of 20.2 cm along the track. 2) If the cart is moving with a speed of 2.86 m/s when it has reached a displacement of 20.2 cm along the track, calculate how fast (in m/s) the cart was moving at the start (at displacement = 0)

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