A bomb mass 7.2 kg goes off and splits into 3 pieces. The first piece has a mass of 1.1 kg and velocity of 9.5 m/s. The second piece has a mass of 2.2 kg and a velocity of 4.0 m/s perpendicular to the path of the first piece.
a) What is the mass of the third piece?
b) What is the magnitude and direction of the velocity of the third piece?
c) If the third piece hits a wall and is embedded in it, what is the average force it exerts on the wall if the time duration of the impact is 5 ms?