A toy cannon uses a spring to project a 5.80 g projectile. The spring is originally compressed with 8.00 cm and has a force constant of 15.54 N/m. When the spring is released, the projectile slides 15.0cm during the barrel of the cannon where the barrel exerts a constant fictional force on the projectile. The projectile leaves the barrel of the cannon by a speed of 3.50m/s. The barrel of the cannon makes a 60 degree angle with respect to the horizontal surface. Neglect any air resistance or any rotational effects. Suppose that the projectile's starting elevation is at ground level. What is the force of kinetic friction among the projectile and the barrel of the cannon? What is the maximum height of the projectile above ground level during its flight? How long does it take the projectile to reach its height?