Rotational Dynamics Physics - Rotational Dynamics

• A
  $\frac{r g}{\cos \theta}$
• B
  $\frac{r g}{L}$
• C
  $\frac{g}{L}$
• ✓
  $\frac{r g}{L \cos \theta}$.

Answer: D.

• ✓
  $\frac{m g L}{\sqrt{L^2-r^2}}$
• B
  $\frac{m g L}{\sqrt{L^2+r^2}}$
• C
  $\frac{m g L}{\sqrt{2} r}$
• D
  $\frac{m r g \tan \theta}{L}$

Answer: A.

• A
  $\frac{1}{2 \pi} \sqrt{\frac{l \cos \theta}{g}}$
  
• B
  $\frac{1}{2 \pi} \sqrt{\frac{l \sin \theta}{g}}$
  
• ✓
  $4 \pi \sqrt{\frac{l \cos \theta}{4 g}}$
  
• D
  $4 \pi \sqrt{\frac{l \tan \theta}{g}}$.
  

Answer: C.

• A
  $\sqrt{\frac{r}{g}}$
  
• B
  $2 \pi \sqrt{\frac{r}{g}}$
  
• ✓
  $2 \pi \sqrt{\frac{r}{g \tan \theta}}$
  
• D
  $2 \pi \sqrt{\frac{r \tan \theta}{g}}$.
  

Answer: C.

• A
  $5 \mathrm{~m} / \mathrm{s}$
  
• ✓
  $10 \mathrm{~m} / \mathrm{s}$
  
• C
  $15 \mathrm{~m} / \mathrm{s}$
  
• D
  $20 \mathrm{~m} / \mathrm{s}$.
  

Answer: B.