Answer:40kg
Step-by-step explanation:
Velocity(v)=5m/s
Kinetic energy(ke)=100j
mass=?
Mass=(2xke) ➗ v^2
Mass=(2x500) ➗ 5^2
Mass=1000 ➗ 5x5
Mass=1000 ➗ 25
Mass=40kg
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