Answer: 92.7Joules//
Explanation:
Kinetic energy of moving body is 1/2mv²
K=1/2mv²
Mass = 0.145kg
V=80mil/h = 80×1609.34/3600
=35.76m/s, since 1 mile = 1609.34m and 1 hour = 3600seconds.
From the equation K=1/2mv² you can input.
K=1/2×0.145×35.76²
K=1/2×185.422
K= 185.422/2
K=92.7J//
