Answer:
The efficiency is [tex]11.\overline{1}\%[/tex]
Explanation:
Define efficiency as (energy stored in the spring) / (kinetic energy of the object before compression)*100%.
The moving object had a kinetic energy
[tex]E_k = \frac{1}{2}mv^2=\frac{1}{2}2kg\cdot 36 \frac{m^2}{s^2}=36J[/tex]
The compressed spring stores a so-called elastic energy, which is given by
[tex]E_e=\frac{1}{2}kd^2=\frac{1}{2}8\frac{N}{m}\cdot 1^2m^2=4J[/tex]
So the efficiency is:
[tex]\epsilon = \frac{E_e}{E_k}\cdot100\%=\frac{4J}{36J}\cdot 100\%=11.\overline{1}\%[/tex]
Answer:
The efficiency is 11.1%
Explanation:
Define efficiency as (energy stored in the spring) / (kinetic energy of the object before compression)*100%.
The moving object had a kinetic energy
The compressed spring stores a so-called elastic energy, which is given by
So the efficiency is: 11.1
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