[问答题]
State the principle of conservation of mechanicwjv z82dwn cvph4 /:7bpwau92 al energy3wn5jlil wv7(-k5b xh for conservative forces i lbhw(k3nx 75w5l-vj.
参考答案: If only conservative forces are acting, the total mechanical energy of a system neither increases nor decreases in any process. It stays constantπit is conserved.
