Recent content by Minming

Hi, the law of cosines and implicit differentiation is useful, I get the answer by dθ'/dα =0, and get sinθ'=m 2/m1, it's same to the answer(when m1> m2). thanks

Thanks. I'll study centre-of-momentum frame, and try to solve it.

Thank you. The Lagrangian mechanics seems difficult....

Thanks. I get it.

Hi, Steve4 I get it ,thinks.

Thank you, kuruman I have a misstake in the knowledge in pully. And your advice about effective mass and effective acceleration is very useful for me. Thanks.

Hi, BvU I take the pulley, m1 and m2 as a box. This box's mass is (m1+m2), and ΣF=FT3-(m1+m2)g.

Solution: