6. Two cars are at a stop light. When the light turns green the car of mass m begins to move with acceleration a; the car of mass 2m moves in the same direction with acceleration a/2. Which car engine delivers the most power? Explain your answer. (a) the car of mass m (b) the car of mass 2m (c) the power is the same for both cars

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how much power in watts is required to accelerate a 1200 kg car from rest to 16 m/s in 8 seconds against a constant air resistance of 350 N

30.Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0° slope at constant speed, as shown below. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves 30.0 m along the hill? (b) How much work is done by the rope on the sled in this distance? (c) What is the work done by the gravitational force on the sled? (d) What is the total work done? 60° W T