Respuesta :
Answer:
The maximum spring compression = 3.21 m
Explanation:
The height of the circus performer above the platform connected to string material = 5.8 m
Let the maximum compression of the spring from the impact of the circus performer be x.
According to the law of conservation of energy, the difference in potential energy of the circus performer between the initial height and the level at which spring is compressed to is equal to the work done on the spring to compress it by x
Workdone on the spring by the circus performer = (1/2)kx²
where k = spring constant = 1200 N/m
Workdone on the spring by the circus performer = (1/2)(1200)x² = 600x²
The change in potential energy of the circus performer = mg (5.8 + x)
m = mass of the circus performer = 70 kg
g = acceleration due to gravity = 9.8 m/s²
The change in potential energy of the circus performer = (70)(9.8)(5.8 + x) = (3978.8 + 686x)
600x² = 3978.8 + 686x
600x² - 686x - 3978.8 = 0
Solving this quadratic equation
x = 3.21 m or - 2.07 m
Since the negative answer doesn't satisfy the laws of physics, our correct answer is 3.21 m
Hope this Helps!!!
