A 3.0kg steel ball strikes a massive wall at 10m/s at an angle of 60degrees with the plane of thge wall. It bounces off with the same speed and angle. If the ball is in contact with the wall for .20s, wut is the average force exerted on the ball by the wall? its is wut i got.. p=mv p=mv 3(10) =3(-10) =30 =-30 deltaP=mvfinal-mvinitial =30-(-30) =60 averageF=deltaP/delta time =60/.2 =300N correct or incorrect? can someone help me?