A child and sled with a combined mass of 45. 0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 2. 20 m/s at the bottom, what is the height of the hill?.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.