Question

对做一个自由落体运动的物体,他在前一半时间t和后一半时间t下落的高度之比为

Answer 1

v'=gt

x1=1/2gt^2

x2=v't+1/2gt^2

x1/x2=(1/2gt^2)/v't+1/2gt^2=1/2(gt^2)/gt^2+1/2gt^2=(1/2gt^2)/(3/2gt^2)=1/3