(Solved):   Two blocks A and B move towards each other in a straight line on a smooth table. The block ...

 

Two blocks A and B move towards each other in a straight line on a smooth table. The blocks have the same speed \( u \). Block A has mass \( m \) and moves to the right (positive direction), while block B has mass \( 4 m \) and moves to the left. On the front of each block is a spring, which ensures that the blocks undergo an elastic collision. The velocities of the blocks \( v_{\mathrm{A}} \) and \( v_{\mathrm{B}} \) after the collision are A) \( v_{\mathrm{A}}=-\frac{11}{5} u \) and \( v_{\mathrm{B}}=-\frac{1}{5} u \) B) \( v_{\mathrm{A}}=0 \) and \( v_{\mathrm{B}}=0 \) C) \( v_{\mathrm{A}}=-\frac{23}{17} u \) and \( v_{\mathrm{A}}=-\frac{7}{17} u \) D) \( v_{\mathrm{A}}=-u \) and \( v_{\mathrm{B}}=u \) E) Do not know