A particle of mass 5m at rest suddenly breaks on its own into three fragments. Two fragments of mass m each move along mutually perpendicular direction with speed v each. The energy released during the process is,

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

$\frac{4}{3} {mv}^{2}$

$\frac{3}{5} {mv}^{2}$

$\frac{5}{3} {mv}^{2}$

$\frac{3}{2} {mv}^{2}$

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

From conservation of linear momentum,

$0 = mv \hat{j} + mv \hat{i} + 3 m {\vec{v}}_{1} \Rightarrow {\vec{v}}_{1} = - \frac{v}{3} (\hat{i} + \hat{j}) \Rightarrow v_{1} = \frac{\sqrt{2}}{3} v$

From conservation of energy,

${KE}_{i} = 0; {KE}_{f} = \frac{1}{2} {mv}^{2} + \frac{1}{2} {mv}^{2} + \frac{1}{2} (3 m) {(\frac{\sqrt{2}}{3})}^{2} v^{2} = {mv}^{2} + \frac{{mv}^{2}}{3} = \frac{4}{3} {mv}^{2}; \Rightarrow ΔKE = {KE}_{f} - {KE}_{i} = \frac{4}{3} {mv}^{2}$

Watch 3-min video & get full concept clarity

hear from our champions

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

🔥 Start Your JEE/NEET Prep at Just ₹1999 / month - Limited Offer! Check Now!

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET