There are three identical cannons set up in a parking lot, and they are all aimed horizontally. In cannon 1, the mass of the cannonball is 3kg. In cannon 2, the mass of the cannonball is 6 kg. In cannon 3, the mass of the cannonball is 9kg. Each cannon applies 1200N of force when they are fired. Compare the horizontal acceleration of the cannonballs when they are first fired from the cannons. Use the Claim, Evidence and Justification structure to write a complete answer.