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# week2 - Physics 1 Discussion Section Problem for the week...

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Physics 1 Discussion Section Problem for the week of April 5-9, 2010 Instructions: Work this problem as a group. Hand in only one completed work- sheet for your group, including all of the steps in the “I SEE” problem-solving process. Problem: Traﬃc Safety You have secured a job as a traﬃc safety engineer. Your ﬁrst task is to determine the safety of a mountain road where the speed limit is 90 km/h. You make the following assumptions: A truck traveling at 72 km/h is followed by a car traveling at the same speed. The car is 64 meters behind the front end of the truck. You also decide to ignore the lengths of the car and truck, and treat them as point objects. The car must accelerate and pass the car safely in a passing zone that is 300 meters long. You decide to ﬁnd the minimum distance the car needs to pass the truck if the car accelerates at 2.0 m/s 2 . You also assume the car begins to pass at the beginning of the passing zone. Can the car safely pass the truck? To back up your conclusions, include x - t and v x - t graphs that show the motions of both the car and the truck.

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week2 - Physics 1 Discussion Section Problem for the week...

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