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2 years ago

A woman carries a 10kg box up a set of 5m high stairs and then down a 12m long hallway. How much work does she do on the box?

Physics

1 answer:

nika2105 [10]2 years ago

7 0

Answer: 1666J

Explanation:

Given that,

Mass of box (m) = 10kg

Total distance covered by box (h)

= (5m + 12m)

= 17m

work done on the box = ?

Work is done when force is applied on an object over a distance. Hence, the magnitude of work done on the box depends on its mass (m), distance covered (h), and acceleration due to gravity (g)

(g has a value of 9.8m/s²

i.e Work = mgh

Work = 10kg x 9.8m/s² x 17m

Work = 1666J

Thus, 1666 joules of work was done by the woman on the box.

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Answer:

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Potential energy is minus the integral of Fdx. Doing the integration yields:

$U=\int\limits {6.0x+12}\, dx$

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$U(0)=20J$

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3 years ago

A hockey player applies an average force of 80.0 N to a

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Answer:

$Impulse = 8.0Ns$

Explanation:

Given

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Required

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$Impulse = 80.0N * 0.10s$

$Impulse = 8.0Ns$

<em>Hence, the impulse experienced is 8.0Ns</em>

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<h3>Further explanation</h3>

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