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A roller coaster, traveling with an initial speed of 21 m/s, decelerates uniformly at -3.5 m/s2 to a full stop. How far does the roller coaster travel during its deceleration?
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40 votes
40 votes
A roller coaster, traveling with an initial speed of 21 m/s, decelerates uniformly at -3.5

m/s2 to a full stop. How far does the roller coaster travel during its deceleration?

User Jianjian Yang
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1 Answer

20 votes
20 votes

Answer:

S = Vo t + 1/2 a t^2 distance traveled

t = (V2 - V1) / a = (0 - 21) / -3.5 = 6 sec time to stop

S = 21 * 6 - 3.5 * 6^2 / 2 = 63 m distance traveled

User Kokovin Vladislav
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3.4k points
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