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navik [9.2K]
3 years ago
12

The climber dropped her compass at the end of her 240-meter climb. How long did it take to strike bottom?

Physics
2 answers:
Maru [420]3 years ago
6 0

Answer:

7 seconds

Explanation:

Let's first write down what we have so that we can choose the correct equation of linear motion

initial velocity (u) = 0 m/s

distance (x) = h = 240 m

acceleration (a) = g = 9.81 m/s²

s = ut + \frac{at^{2} }{2} \\\\240 = (0)(t) + \frac{9.81t^{2} }{2}\\ \\9.81t^{2} = 480\\\\t = 6.99s\\\\t = 7 s

ANEK [815]3 years ago
4 0

240 = 0+1/2 (-9.8t

240 = -4.9t

<span>240/-4.9 = t</span><span>
</span>49.0 = t

t= 7.0s

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1 year ago
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The energy that was lost due to air resistance while she was bouncing is determined as 3,360 J.

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