Find the acceleration vector in terms of ur and u?.r = a(6 - cos ?) and 
= 4
A. a = 36a( cos ? - 4a + a cos ?)ur + (72a sin ?)u?
B. a = 16a( cos ? - a + a cos ?)ur + (32a sin ?)u?
C. a = 16a(2 cos ? - 6)ur + (32a sin ?)u?
D. a = 16a( cos ? + 6a - a cos ?)ur - (32a sin ?)u?
Answer: C
Mathematics
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?
?
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A. 
B. 
C. 
D. 
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