About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, what is the force on the crate?

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About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, what is the force on the crate?

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Answer 1 · 2015-12-04T13:44:53

I found $F = 10 N$ $F=10N$

Explanation:

Considering no friction, the enrgy is used up entirely to move the crate in the form of work done on the system and it will be:
$W = \to F \cdot \to d = F \cdot d \cdot cos (θ) =$ $W=vecF*vecd=F*d*cos(theta)=$
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$40 = F \cdot 4$ $40=F*4$
rearranging:
$F = \frac{40}{4} = 10 N$ $F=40/4=10N$

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About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, what is the force on the crate?

1 Answer

Explanation:

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