Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति
JEE Main & Advanced
Physics
Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति
Question Bank
Self Evaluation Test - Work, Energy and Power
question_answer
Two objects each of mass m are connected with a uniform rope having same mass m and length \[\ell =10/3\] m are shown in the figure. The rope can slide on a frictionless pulley which is fixed to the edge of the table. Initially 1/3 of the rope hangs vertically. Friction is negligible everywhere. If the system is released from rest and object on the right hand side descend further by a distance of 1/3, what would be the speed of the object (in m/s)?
A)2.12 m/s
B)3.33 m/s
C)0.33 m/s
D)4.12 m/s
Correct Answer:
B
Solution :
[b] initial Final By using mechanical energy conservation \[v=\frac{10}{3}=3.33m/s\]