A 400 kg cannon shoots cannonballs of mass 2.8 kg. The cannonball has a velocity of magnitude 280 m/S when it leaves the cannon. The length of the cannon bore is 1.3 m. 1. What is the time of ight of the cannonball inside the cannon bore? 2. The cannon shoots at an angle of 5, what is the recoil velocity (magnitude and direction) of the cannon (assuming there is no iction with ground). Explain and state all your assumptions. 3. It turns out that there is indeed friction with the ground and the cannon does not move at all. What is the magnitude of the friction force