Answer:
U = 5.36 J
Explanation:
Given,
mass of the spike = 0.83 Kg
initial speed of the spike = 3.8 m/s
energy absorbed = 89.4 %
Change in internal energy = ?
Kinetic energy absorbed by the spike is converted into internal energy.
[tex]\Delta KE = internal\ energy(U)[/tex]
[tex]U = 89.4 \% \times \dfrac{1}{2}mv^2[/tex]
[tex]U = 0.894\times \dfrac{1}{2}\times 0.83\times 3.8^2[/tex]
U = 5.36 J
Hence, increase in internal energy is equal to 5.36 J.
