a student who's mass is 150kg is skateboarding down the sidewalk at an acceleration of 18.5m/s2, what is the net force

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s