# How can I estimate the power between the guide and the sky diver?

I would like to estimate the Maximum power/ tension that can be, between the sky diving guider and the "tourist".

In this picture what the max tenstion will be, I think it is maximum when the parachute is opened.

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Given your tag of 'estimation' I would just use $$a=\frac{v-v_0}{t}$$ plugging in some numbers for terminal velocity $v$ and a 'safe' parachute deployed velocity $v_0$. Then assume ~$1\rm{s}$ for $t$ and we have an a, those wiki links should confirm whether your numbers are good!
For fun can I suggest calculating $a$ for $v=0$ and $t\approx0.5\rm{s}$ ;-)