Answer:
3.55kg
Explanation:
K. E = ½mv²
Where m = mass, v = velocity
K. E = 300J
v = 13m/s
Therefore,
K. E = ½mv²
300 = ½ × m × 13²
Multiply both sides by 2
600 = m × 169
Divide both sides by 169
m = 600 ÷ 169
mass = 3.55kg
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