Footprint calligraphy

(1) The object moves horizontally on the surface of the moon,

Horizontal direction: x=v0t

Vertical direction: h= 12gt2.

Gravitational acceleration of the lunar surface: g=2hv20x2.

Let the mass of the moon be m, and for an object with the mass of the moon surface being m, it is equal to gravity according to gravity.

GMmR2=mg

Solution: M=2hR2v20G? x2

According to the density formula: ρ = MV ρ=MV=3hv202GπRx2. ..

(2) Let the speed of the spacecraft flying around the surface of the moon be V, according to the principle that gravity equals gravity.

Yes: mg=? mv2R

Solution: v=v0x2hR

Answer: (1) The density of the moon is 3hv202g π rx2;

(2) The speed of the spacecraft orbiting the lunar surface is V 0x2hr.