Question

一质点做匀速直线运动,加速度为a,t妙末的速度为v,则t秒后质点的位移是多少?

Answer 1

V=Vo + at

Vo = V -at

2aS= V^2 - Vo^2

2aS=V^2 -(V-at)^2

2as = 2Vat - (at)^2

S= Vt - at^2/2