1912 Problem 2.58 Problem 2.58 Part A Amtrak\'s 20th-Century Limited is en route

Question

1912 Problem 2.58 Problem 2.58 Part A Amtrak's 20th-Century Limited is en route from Chicago to New York at 120 km/h when the engineer spots a cow on the track The train brakes to a halt in 1.7 min, stopping est in front of the What is the magnitude of the train's acceleration? Express your answer to two significant figures and include the appropriate units : 0.33 My Answers Give Up Correct Part B Whats the drection of the acceleration? Westward My Answets Give Up Correct Part C How far was the train from the cowr when the engineer tirst applied the brakes? Express your answer to two significant fngures and include the appropriate units. Type here to search

Explanation / Answer

Applying Newton's 2nd equation of motion,

s = ut + 0.5 at2

s = (33.33 x 102) + (0.5 x (- 0.33) x 1022) = 1683 m or 1.68 km

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