第二节 动能定理（课件）-【中职专用】高中物理同步精品课堂（高教版机械建筑类）

主题三 功和能 第二节 ... text has been truncated due to evaluation version limitation. 【问题引入... text has been truncated due to evaluation version limitation. 列车的动能... text has been truncated due to evaluation version limitation. 磁悬浮列车... text has been truncated due to evaluation version limitation. 一、能的概... text has been truncated due to evaluation version limitation. ... text has been truncated due to evaluation version limitation.如果一个物... text has been truncated due to evaluation version limitation. 不同运动形... text has been truncated due to evaluation version limitation. ... text has been truncated due to evaluation version limitation.能的概念 2... text has been truncated due to evaluation version limitation.功是能量变... text has been truncated due to evaluation version limitation. ... text has been truncated due to evaluation version limitation.（1）做功使不... text has been truncated due to evaluation version limitation. ... text has been truncated due to evaluation version limitation.（2）功是能量... text has been truncated due to evaluation version limitation. 二、动能 运动 N·m 状态量 不同 地面 标量 【例1】某物体做... text has been truncated due to evaluation version limitation.t1时刻速率为v，在t2时刻速率为nv，则在t2时刻的动能... text has been truncated due to evaluation version limitation.t1时刻的（ ... text has been truncated due to evaluation version limitation.）A．n倍 B．n/2倍 C．n2倍 D．n2/4倍 C 【例2】关于动能... text has been truncated due to evaluation version limitation.A．凡是运动... text has been truncated due to evaluation version limitation.B．重力势能... text has been truncated due to evaluation version limitation.C．一定质量... text has been truncated due to evaluation version limitation.D．动能不变... text has been truncated due to evaluation version limitation. 【答案】AC【详解】A．动能是物... text has been truncated due to evaluation version limitation.A正确；B．动能只能... text has been truncated due to evaluation version limitation.B错误；C．由于速度... text has been truncated due to evaluation version limitation.C正确；D．做匀速圆... text has