Question

Which of the following relations is wrong ?

• A. $\overline{J}=\overline{r}\times \overline{P}$
• B. $\overline{a}=\overline{r}\times \overline{\alpha }$
• C. $\overline{v}=\overline{\omega }\times \overline{r}$
• D. $\tau =\frac{d\overline{J}}{dt}$

Answer 1

Answer: (B)

$\overline{a}=\overline{r}\times \overline{\alpha }$

The relation for acceleration should be $\overline{a}=\overline{\alpha }\times \overline{r}$