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2 years ago

The world record for pole vaulting is 6.15 m. If the pole vaulter’s gravitational potential is 4942 J, what is his mass?

Physics

1 answer:

N76 [4]2 years ago

8 0

From the calculations, the mass of the pole is 82 Kg.

<h3>What is potential energy?</h3>

The term potential energy has to do with the energy that is possessed by a body by virtue of its position.

Given that;

height = 6.15 m

PE = 4942 J

mass = ??

g = 9.8 m/s^2

Now

PE = mgh

m = PE/gh

m = 4942 J/9.8 m/s^2 * 6.15 m

m = 82 Kg

Learn more about potential energy:brainly.com/question/24284560?

#SPJ1

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$d_2$ is the distance of the point from the second source

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In this problem, we have

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So let's use eq.(1) to see if the resulting m is an integer

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If we apply the same procedure to eq.(2), we find

$m=\frac{\delta}{\lambda}-\frac{1}{2}=\frac{65.0 m}{26.0 m}-0.5=2$

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In this case we have

$d_1 = 91.0 m\\d_2 =221.0 m$

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Using the condition for constructive interference:

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Which is an integer, so this is a point of constructive interference.

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In this case we have

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So the path difference is

$\delta =|44.0 m-135.0 m|=91.0 m$

Using the condition for constructive interference:

$m=\frac{\delta }{\lambda}=\frac{91.0 m}{26.0 m}=3.5$

This is not an integer, so this is not a point of constructive interference.

So let's use now the condition for destructive interference:

$m=\frac{\delta}{\lambda}-\frac{1}{2}=\frac{91.0 m}{26.0 m}-0.5=3$

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