Question

某物体从静止开始作匀加速运动,经历t时间位移为s

Answer 1

S=(1/2)at^2

(S/2)at1^2

(t1/t)^2=1/2

t1=t/(根号2).B对Ax

S=(1/2)at^2

S'=(1/2)a(t/2)^2=(1/4)*(1/2)at^2=S/4.C.D错

选B