Tangential and centripetal acceleration of a particle speeding up on a circle

1. A.
   20 N
2. B.
   $20\sqrt{23}\ \text{N}$
3. C.
   $20\sqrt{26}\ \text{N}$
4. D.
   10 N

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1. A.
   $\frac{1}{4}$
2. B.
   $\frac{1}{3}$
3. C.
   $\frac{1}{2}$
4. D.
   $\frac{2}{3}$

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1. A.
   0.4 s
2. B.
   0.5 s
3. C.
   0.8 s
4. D.
   1.0 s

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1. A.
   $V = \dfrac{r\alpha}{3}$
2. B.
   $V = \alpha\sqrt{\dfrac{r}{2}}$
3. C.
   $V = r\sqrt{\dfrac{\alpha}{3}}$
4. D.
   $V = \sqrt{\dfrac{\alpha r}{3}}$

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1. A.
   $0.2$ s
2. B.
   $0.4$ s
3. C.
   $0.5$ s
4. D.
   $0.6$ s

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