Answer:
0.833 J
Explanation:
The initial kinetic energy of the spike is:
KE = ½ mv²
KE = ½ (0.52 kg) (3.7 m/s)²
KE = 3.56 J
23.4% of this energy is converted to internal energy.
U = 0.234 (3.56 J)
U = 0.833 J
