Mrs. Jacobs dropped an object from 10 meters. She knows it did 50 joules of work. How much did it weigh?

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Mrs. Jacobs dropped an object from 10 meters. She knows it did 50 joules of work. How much did it weigh?

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Answer 1 · 2018-01-17T10:33:39

$0.51 k g$ $0.51kg$

Explanation:

Work = force x distance (simplest form)
Force in this case would be gravitational force, which is mass x gravitational field strength.
But let's find out the force first. Since the object travels in the parallel direction to the force, we can disregard $cos θ$ $costheta$ .
$50 = F \cdot 10$ $50=F*10$
$F = 5 N$ $F=5N$
Then:
$F = m g$ $F=mg$
$5 = m \cdot 9.8$ $5=m*9.8$
$m \approx 0.51 k g$ $m≈0.51kg$

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Mrs. Jacobs dropped an object from 10 meters. She knows it did 50 joules of work. How much did it weigh?

1 Answer

Explanation:

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