An 80-lb boy sitting in a stationary 20-lb wagon wants to simulate rocket propulsion by throwing...

  

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An 80-lb boy sitting in a stationary 20-lb wagon wants to simulate rocket propulsion by throwing bricks out of the wagon. Neglect horizontal forces on the wagon's wheels. (Figure 1) Part A If the boy has three bricks weighing 10 lb each and throws them with a horizontal velocity of 10 ft/s relative to the wagon, determine the velocity he attains if he throws the bricks one at a time. Express your answer with the appropriate units. v = Value Units Figure 1 of 1 Submit My Answers Give Up Part B Determine the velocity he attains if he throws them all at once. Express your answer with the appropriate units. Value Units Submit My Answers Give Up An 80-lb boy sitting in a stationary 20-lb wagon wants to simulate rocket propulsion by throwing bricks out of the wagon. Neglect horizontal forces on the wagon's wheels. (Figure 1) Part A If the boy has three bricks weighing 10 lb each and throws them with a horizontal velocity of 10 ft/s relative to the wagon, determine the velocity he attains if he throws the bricks one at a time. Express your answer with the appropriate units. v = Value Units Figure 1 of 1 Submit My Answers Give Up Part B Determine the velocity he attains if he throws them all at once. Express your answer with the appropriate units. Value Units Submit My Answers Give Up