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May 23, 2015

Homework Help: math

Posted by feysal on Saturday, March 12, 2011 at 12:52am.

A particle is traveling along a one-dimensional path (such as a number line). The position of the particle is
governed by the time function x(t) É≠ 3t 4 É{16t3 Éy18t 2 Éy 2 , where t is in minutes and 0 ĄT t ĄT 5 . Answer the
following questions.
a) At what times is the particle stationary?
b) For which time intervals is the particle moving in a positive direction? A negative direction?
c) What is the particle°¶s most positive position? Most negative position?
d) What is the particle°¶s displacement? What is the total distance the particle has traveled?
e) When does the particle°¶s acceleration undergo a sign change? What is the particle°¶s acceleration at the
times when the particle is stationary?
f) Sketch a graph (on a t-x coordinate plane) of the particle°¶s position using the information above.

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