质点的运动学方程为F=Rcosti+Rsintj+2tk,R为正常数,当t+π2时其速度为V=___.和加速度a=_____。
V=Rcosti+Rsintj+2tk,t=π2时V=Rj+πkV=√(R²+π²)a=dVdt=-Rsinti+Rcostj+2k,t=π2时a=-Ri+2ka=√(R²+4)当然不会啦,我是个女生,也是intj类型的!其实
V=Rcosti+Rsintj+2tk,t=π2时V=Rj+πkV=√(R²+π²)a=dVdt=-Rsinti+Rcostj+2k,t=π2时a=-Ri+2ka=√(R²+4)当然不会啦,我是个女生,也是intj类型的!其实