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Unformatted text preview: This assignment is due:Wed, Oct 18, 2006 at 23:59. 1. [2pt] You are testing a new car in a windtunnel for road and wind resistance. At a speed of 85.0 km/hr you have found that 64.0 % of the total output power of an automobile engine is used in overcoming the resistance of the road and wind against the movement of the car. If the output power of a particular car engine is 59.00 HP, what is this resistance? Give your answer in Newtons. (Take one HP as 746 Watts.) Answer: Top You have 6 tries 2. [2pt] In midnineteenth century England horses were often used to pull barges along canals. The horse, naturally, trudged along a path parallel to the canal and so the rope to the barge was at an angle to the motion of the barge. If such a horse was pulling with a force of 150 N at a speed of 10.60 km/hr and the angle of the rope with respect to the canal direction was 26.0 how much work(in KJ) does the horse do in 11.8 min ? Answer: Top You have 6 tries 3. [2pt] What is the average power of the horse? (Give your answer in HP.) Answer: Top You have 6 tries 4. [2pt] Two wads of putty are propelled horizontally directly toward each other. One wad has a mass of 4.40 kg and is traveling at 23.0 m/s East. The other wad, which is 4.10 kg, is moving at 18.0 m/s West. They collide and stick together. What is the velocity (in m/s) of the joint mass of putty? (Take velocity to the East as positive.) Answer: Top You have 6 tries 5. [2pt] Two acrobats, each of 50.0 Two acrobats, each of 50....
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This note was uploaded on 04/13/2008 for the course PHYS 101 taught by Professor Prof during the Spring '08 term at McGill.
 Spring '08
 prof
 Resistance, Power

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