0.5*g*(T+0.15)^2-0.5*g*T^2=2
问题描述：
0.5*g*(T+0.15)^2-0.5*g*T^2=2
答
2=0.5*g*(T+0.15)^2-0.5*g*T^2
=0.5g[(T+0.15)^2-T^2]
=0.5g[(T+0.15)+T]*[(T+0.15)-T]
=0.15g(2T+0.15)*0.15
=0.0225g(2T+0.15)
2T+0.15=2/(0.0225g)
T=[1/(0.0225g)]-0.075