Question

For a system of particles and rigid body,

• A. $\frac{dP}{dt}=F_{\text{ext }}$
• B. $\frac{dL}{dt}={\tau }_{ext}$
• C. $\frac{dl}{dt}={\tau }_{int}$
• D. Both (a) and (b)

Answer 1

Answer: (D)

For a system of particles, and rigid body
$\frac{dP}{dt}=F_{ext},\frac{dL}{dt}={\tau }_{ext}$