$\text { Find the velocity vector in terms of } u _ { r } \text { and } u _ { \theta } \text {. }$

question 41

Multiple Choice

$\text { Find the velocity vector in terms of } u _ { r } \text { and } u _ { \theta } \text {. }$
- $\mathrm { r } = \mathrm { e } ^ { \mathrm { a } \theta } \text { and } \frac { \mathrm { d } \theta } { \mathrm { dt } } = 3$

• A) \(\mathbf { v } = 3 a \mathrm { e } ^ { \mathrm { a } \theta _ { \mathbf { u } _ { \mathrm { r } } } + 3 \mathrm { e } ^ { \mathrm { a } \theta _ { \mathbf { u } } } \mathbf { u } _ { \theta } }\)
• B) \(\mathbf { v } = 3 a \mathrm { e } ^ { \mathrm { a } \theta _ { \mathbf { u } _ { \mathrm { r } } } + 3 a \mathrm { e } ^ { \mathrm { a } \theta _ { \mathbf { u } } } \mathbf { u } _ { \theta } }\)
• C) \(\mathbf { v } = 3 e ^ { a \theta _ { \mathbf { u } _ { \mathrm { r } } } + 3 a \mathrm { e } ^ { \mathrm { a } \theta _ { \mathbf { u } } } }\)

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