ch02-p093 - 93. The object, once it is dropped (v0 = 0) is...

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93. The object, once it is dropped ( v 0 = 0) is in free-fall ( a = – g = –9.8 m/s 2 if we take down as the – y direction), and we use Eq. 2-15 repeatedly. (a) The (positive) distance D from the lower dot to the mark corresponding to a certain reaction time t is given by Δ yD g t =− 1 2 2 , or D = gt 2 /2. Thus, for 1 50.0 ms t = , D 1 3 2 98 500 10 2 0 0123 = × = .. . m/s s m = 1.23 cm. 2 ch c h (b) For t 2 = 100 ms,
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This note was uploaded on 09/03/2009 for the course PHYS 1200 taught by Professor Stoler during the Spring '06 term at Rensselaer Polytechnic Institute.

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