Use the Figure for the Question

question 23

Multiple Choice

Use the figure for the question. The graph shows the speed of a light truck of mass 4000 kg coasting on neutral down a level straight road.The truck is slowing down due to air resistance and rolling friction.
-Suppose the driver decides to put the truck in gear and steps on the accelerator at 5s.What is the power needed to maintain the speed at 5s?

• A)20 kW
• B)40 kW
• C)60 kW
• D)80 kW
• E)100 kW

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