Find the velocity vector in terms of ur and u?.r = 2 cos 2t and ? = 4t
A. v = (-2 sin 2t)ur + 8cos 2tu?
B. v = (-4 sin 2t)ur + 8cos 2tu?
C. v = (-8 sin 4t)ur + 4cos 4tu?
D. v = (4 sin 2t)ur + 8cos 2tu?
Answer: B
Mathematics
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- 
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B. 
- 
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C. 
- 
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D. 
- 
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6 yd
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