(1)由机械能守恒
m1gL(1-cos37°)=1/2m1Vo² Vo=2(m/s)
(2)设碰后速度为v,由动量守恒得
m1Vo=(m1+m2)V
△E=m1gL(1-cos37°)-1/2(m1+m2)V²
△E=0.032(J)