(1) When the lander falls from the highest point to the surface of Mars, it makes a flat throwing motion, and obtains the flat throwing law:

Is there x=v0t in the horizontal direction? ①

The vertical direction is h= 12g0t2②.

The distance s between the landing point and the highest point satisfies s2=x2+h2③.

The acceleration of gravity on the surface of Mars g0=2hv20s2 is obtained from the above formula 3? h2④

(2) For an object on the surface of Mars, gravity is equal to the universal gravity of Mars, and mg0=GMmR2? ⑤

Substitute ④ into ⑤ to get the mass of Mars? M=2hv20R2G(s2？ h2)？ ?

A: (1) What is the acceleration g0 of gravity on the surface of Mars? h2。

(2) The mass m of Mars is 2hv02R2G(s2? h2)。