A 5-kg box slides 10 m diagonally down a frictionless ramp inclined at 45. At the bottom of the ramp, it slides on a rough horizontal concrete floor with a coefficient of friction of 0.6. d = 10 m Ramp is frictionless 0 = 45 F 241. What is the speed of the box as it reaches the bottom of the ramp? 242. How far does the box travel on the concrete before coming to a complete stop? 243. Two cannons fire identical cannonballs with the same amount of powder. The barrel of cannon 2 is twice as long as the barrel of cannon 1. How does the velocity of a cannonball fired from cannon 2 compare with that of the ball fired from cannon 1? 244. A tire hangs at rest from a rope in a gravitational field g. The tire has a mass m and a child has a mass equivalent to the mass of two tires. A child runs and jumps on the swing. How fast must the child run in order for the swing to raise a vertical distance d? (A) gd (B) 2gd (C) 22 gd (D) 2gd 245. Two 500-g carts are on a frictionless track. Cart A is moving at 0.2 m/s when it collides into cart B, which is at rest. Both cars move away at 0.1 m/s.