physics and explain your answer please

3) A toycerr of mass m is uleased from point (A) an shem with zeno velocity A) finel the velocity of th con at point (3) B) find the velocity of the cat at psint (c) c) What one she nounal furces acting an the toycar at buth points (O) (B)? (4) Escuping lelocity An custronant is sitting inside a spane vechile. The minind velocity fo sending the vechiel to a circular orbit around th earth must satish the folling equati- mreU2=Gre2Mem,where the rigts side is the graitatial furce, th left side