18. A baseball launcher which uses a spring is advertised to be capable of impar

Question

18. A baseball launcher which uses a spring is advertised to be capable of imparting 20,000 Jof kinetic energy to a 1 kg ball initially at rest. The spring is compressed 0.50 m. What is the elastic energy stored in the spring? 19. What is the value of the spring constant for the launcher in the previous problem? 0. A chimpanzee sits on a suitcase being moved by a conveyor belt at the airport. The package moves at a steady 6 m/s. The chimpanzee has a weight of 750 N. The suitcase is 1500 N. The trip distance is 25 m. What is the work done by the chimpanzee on the suitcase? A 500 kg car is initially at rest Tho

Explanation / Answer

18)

elastis energy stored in the spring is equal to the maximum kinetic energy can acquire by the ball. According to the conservation of energy, energy stored in the spring is 20,000 J

19) spring constant of the spring

     E = ( 1/ 2) k x2

      k = 2 E / x2

          = 2 ( 20,000 J ) / ( 0.50 m )2

           =160000 N/m

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