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3 years ago

A worker uses a cart to move a load of bricks weighing 680 N a distance of 10 m across a parking lot.

Physics

2 answers:

8_murik_8 [283]3 years ago

8 0

The answer is B because force = work times distance so you would multiply 209N times 10m

NNADVOKAT [17]3 years ago

4 0

When you are finding work, the easiest way is to use the formula.

W = F*D

Where F is the force and D is the distance. Simply take the constant force of 209N and multiply it by the distance of 10m. Which will give you 2090J

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a hunter 412.5m from a cliff moves a distance x towards the cliff and fires a gun. he hears the echo from the cliff after 2.2sec

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Explanation:

The speed of sound $s$ is given by a relation between the distance $d$ and the time $t$ :

$s=\frac{d}{t}$ (1)

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$s=330 m/s$ is the speed of sound in air (taking into account this value may vary according to the medium the sound wave travels)

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Having this information clarified, let's isolate $d$ and then find $x$ :

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