Homework 9 Begin Date: 11/17/2016 12:00:00 AM Due Date: 11/29/2016 11:59:00 PM E

Question

Homework 9 Begin Date: 11/17/2016 12:00:00 AM Due Date: 11/29/2016 11:59:00 PM End Date: 12/24/2016 12:00:00 AM (9%) Problem 3: A soccer ball of mass mi kg is initially at rest. Another 0.555 soccer ball of m2 0.499 kg is kicked at the first ball such that the system has an initial momentum vector of Pi Pri Pj where Pr 0.52 kg m/s and P. 0.55 kg m/s. Randomized Variables mi 0.555 kg m2 0.499 kg Pr 0.52 kg m/s 0.55 kg m/s Otheexpertta.com 33% Part (a) Write an expression for the initial velocity vei for m2 in terms of the mass and the initial momentum. 33% Part b) Write an expression for the final velocity lf for m if v2f Ev2i Final Correct Answer Student Answer Grade 95% vif vif Grade Detail Feedback Correct Student Final Answer credit 100% Submission History Feedback Answer Hints Totals VIf P ml (Py-m2 v2 Eymi j 50% 0% Note: Feedback not accessed. 0% VIf P, mla i (Py -m2 v2fymlj 00% 00% 0% 0% Totals 0.5j m/s? All content 2016 Expert TA, LLC

Explanation / Answer

part C)

as the momentum is conserved

m1 * vi1 + m2 * vi2 = m1 * v1f + m2 * v2f

0.52 i + 0.55 j = 0.555 * v1f + 0.499 * v2f

0.52 i + 0.55 j = 0.555 * v1f + 0.499 * 0.5 j

sovling for v1f

v1f = 0.94 i - 0.541 j m/s

magnitude of v1f = sqrt(0.94^2 + 0.541^2)

magnitude of v1f = 1.082 m/s

the magnitude of v1f is 1.082 m/s

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