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3 years ago

Please explain how to solve 17 and 18

Physics

1 answer:

andriy [413]3 years ago

3 0

Answer:

17. h = l − l cos θ

18. 1.40 m

Explanation:

Let's call d the height of the triangle. We can then say:

h = l − d

Using trig, we can write d in terms of l and θ:

d = l cos θ

h = l − l cos θ

If l = 6 m and l cos θ = 40°:

h = 6 − 6 cos 40

h ≈ 1.40

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Answer:

Part a)

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Part b)

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Part c)

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Explanation:

Part a)

While bucket is falling downwards we have force equation of the bucket given as

$mg - T = ma$

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$TR = I\alpha$

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now we have

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$a = \frac{mg}{(\frac{M}{2} + m)}$

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Part b)

speed of the bucket can be found using kinematics

so we have

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Part c)

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Part d)

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Explanation:

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