clocked at 100.8 mi/hr. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate, 60 ft away? 17. In one scene of a Bugs Bunny cartoon, we find Bugs standing on a large flat rock as both he and the rock fall through the air under gravity. Just before impact with the ground, Bugs Bunny steps off the rock and walks away, completely unharmed; the rock is totally destroyed. In terms of Newton's first law of motion, why is this scene unrealistic? 18. After falling from rest at a height of 30 m, a .5 kg ball rebounds upward, reaching a height of 20 m. If the contact between the ball and ground lasted 2 milliseconds, what average force was exerted on the ball? 19. Draw a diagram for a refrigerator magnet stuck to the side of a refrigerator. 20. On takeoff, the combined action of the engines and wings on an airplane exerts an 8000 N force on the plane, directed upward at an angle of 65o above the horizontal. The plane rises with
clocked at 100.8 mi/hr. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate, 60 ft away? 17. In one scene of a Bugs Bunny cartoon, we find Bugs standing on a large flat rock as both he and the rock fall through the air under gravity. Just before impact with the ground, Bugs Bunny steps off the rock and walks away, completely unharmed; the rock is totally destroyed. In terms of Newton's first law of motion, why is this scene unrealistic? 18. After falling from rest at a height of 30 m, a .5 kg ball rebounds upward, reaching a height of 20 m. If the contact between the ball and ground lasted 2 milliseconds, what average force was exerted on the ball? 19. Draw a diagram for a refrigerator magnet stuck to the side of a refrigerator. 20. On takeoff, the combined action of the engines and wings on an airplane exerts an 8000 N force on the plane, directed upward at an angle of 65o above the horizontal. The plane rises with