(1)对初始时刻:mgsinq-mmgcosq=ma0 ①,由右图读出代入①式,
解得:=0.25;
(2)对末时刻加速度为零:mgsinq-mN-kvcosq=0 ②,又N=mgcosq+kvsinq,由右图得出此时=5 m/s代入②式解得:=0.84kg/s.
(1)对初始时刻:mgsinq-mmgcosq=ma0 ①,由右图读出代入①式,
解得:=0.25;
(2)对末时刻加速度为零:mgsinq-mN-kvcosq=0 ②,又N=mgcosq+kvsinq,由右图得出此时=5 m/s代入②式解得:=0.84kg/s.