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833.333kg
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EXPLANATION:
the equation of force is
F = m × a
where:
F is force
m is mass
a is acceleration
but since we have force and acceleration but not mass, we can rearrange the equation to get mass to
m = F ÷ a
plug in the numbers
m = 1,250 ÷ 1.5m/s²
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RESULT:
m = 833.333kg
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