Question

The blocks A and B shown in the figure have masses M_A = 5kg and M_B = 4kg. The system is released from rest. The speed of B after A has travelled a distance 5m along the incline is –

• A. $\frac { \sqrt { 3 } } { 2 } \sqrt { \mathrm { g } }$
• B. $\frac { \sqrt { 3 } } { 4 } \sqrt { \mathrm { g } }$
• C. $\frac { \sqrt { \mathrm { g } } } { 2 \sqrt { 3 } }$
• D. $\frac { \sqrt { \mathrm { g } } } { 2 }$

Answer 1

Answer: (C)

$\frac { \sqrt { \mathrm { g } } } { 2 \sqrt { 3 } }$

Answer 2

Apply energy conservation.