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Asked Feb 14, 2020
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Question in pic below. Specifically a dynamics problem.

14-46. To dramatize the loss of energy in an automobile,
consider a car having a weight of 5000 lb that is traveling at
35 mi/h. If the car is brought to a stop, determine how long
a 100-W light bulb must burn to expend the same amount
of energy. (1 mi = 5280 ft.)
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14-46. To dramatize the loss of energy in an automobile, consider a car having a weight of 5000 lb that is traveling at 35 mi/h. If the car is brought to a stop, determine how long a 100-W light bulb must burn to expend the same amount of energy. (1 mi = 5280 ft.)

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Expert Answer

Step 1

Given data as per question

Weight of the car = 5000 lb = 5000/32.2 = 155.2795 kg

Speed of the car = 35 mile/hr 35×5280/3600 = 51.334...

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