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Snowcat [4.5K]
4 years ago
11

Does work output exceed work input when a machine is used? A) Yes, it does, as machines create energy. B) It depends on the type

of machine used. C) No, it doesn’t, as machines are inefficient. D) No, it doesn’t, as machines cannot create energy.
Physics
1 answer:
chubhunter [2.5K]4 years ago
4 0

D. Machines can never create energy, they just convert it. Remember the law of conservation of matter. It cannot be created or destroyed.

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To solve this problem it is necessary to apply the concepts related to the Period based on gravity and length.

Mathematically this concept can be expressed as

T= 2\pi \sqrt{\frac{l}{g}}

Where,

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First we will find the period that with the characteristics presented can be given on Mars and then we can find the length of the pendulum at the desired time.

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T= 2\pi \sqrt{\frac{0.99396}{1.62}}

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For the second question posed, it would be to find the length so that the period is 2 seconds, that is:

T= 2\pi \sqrt{\frac{l}{g}}

2= 2\pi \sqrt{\frac{l}{1.62}}

l = 0.16414m

Therefore, we can observe also that the shorter distance would be the period compared to the first result given.

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