答案错了,应该是4S
(2V)^2-V^2=2aS
即 3V^2=2aS....................................................<1>
(4V)^2-(2V)^2=2aS'
即 12V^2=2aS'..................................................<2>
<2>/<1>得所求位移为
S'=4S
答案错了,应该是4S
(2V)^2-V^2=2aS
即 3V^2=2aS....................................................<1>
(4V)^2-(2V)^2=2aS'
即 12V^2=2aS'..................................................<2>
<2>/<1>得所求位移为
S'=4S