![](pumpe_15345.jpg) | A MECHANICAL HAMMER WITH A PENDULUM |
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![](pumpe_15645.jpg) | We can observe several experiments with the two armed lever. |
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![](pumpe_15795.jpg) | Here is the fulcrum. |
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![](pumpe_15881.jpg) | The shorter arm is nearer to me, and on the other side is the longer one. |
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![](pumpe_16035.jpg) | At the shorter arm, which is very important, physical pendulum is positioned. |
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![](pumpe_16173.jpg) | Its oscillations cause the two armed lever to oscillate. |
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![](pumpe_16360.jpg) | Very small amount of energy is needed. |
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![](pumpe_16505.jpg) | For mechanical work, with a hammer or a pestle, |
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![](pumpe_16655.jpg) | for example, continuous effort would be necessary. |
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![](pumpe_16810.jpg) | Here, on the other hand, one should only occasionally maintain the oscillation. |
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![](pumpe_17005.jpg) | Very light, ocassional effort, unlike conventional devices, |
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![](pumpe_17109.jpg) | which require continuous input of energy. |
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![](pumpe_17275.jpg) | There is another interesting point. |
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![](pumpe_17345.jpg) | If the pendulum is in motion, and we stop the lever, |
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![](pumpe_17590.jpg) | the pendulum continues with its movements. |
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![](pumpe_17735.jpg) | And when we let go of the lever, it continues to move, as if nothing happened. |
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![](pumpe_17930.jpg) | Unlike the transmission with cogwheels, where if we stop the exit, |
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![](pumpe_18095.jpg) | the entry also stops. So, we have a completely different behaviour. |
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![](pumpe_18235.jpg) | Now, the hammer is hitting the hard surface. |
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![](pumpe_18370.jpg) | If we put a soft object under the hammer, there will be no changes. |
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![](pumpe_18805.jpg) | Because the pendulum is still working in the same way. |
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![](pumpe_19050.jpg) | The power of the device is an interesting topic. |
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![](pumpe_19140.jpg) | Anyone can check the power by holding the longer arm. |
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![](pumpe_19335.jpg) | Here, you can hold and lift it a bit. |
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![](pumpe_19460.jpg) | On the other side, you can move it only with one finger. |
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![](pumpe_19595.jpg) | But, even a very strong person can't stop it. |
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![](pumpe_19735.jpg) | One needs to keep the pendulum oscillating only occasionally. |
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![](pumpe_19845.jpg) | However, the two armed lever can not be stopped, |
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![](pumpe_19945.jpg) | since we have an ideal combination of centrifugal and gravitational forces. |
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![](pumpe_20045.jpg) | When one culminates, the other does the same. |
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![](pumpe_20120.jpg) | It means it is impossible to stop the lever, even though we use the longer arm. |
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![](pumpe_20340.jpg) | Using two flashlights with dynamos, |
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![](pumpe_20445.jpg) | we can see the difference at the entry and exit points. |
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![](pumpe_20560.jpg) | One flashlight will be positioned under the hammerhead, |
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![](pumpe_20714.jpg) | and the other will be used for maintaining the oscillation. |
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![](pumpe_20960.jpg) | And, a drastic difference is obvious, |
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![](pumpe_21050.jpg) | since we only have to maintain the oscillation occasionally. |
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![](pumpe_21195.jpg) | But, on the other end, we see major changes. |
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![](pumpe_21285.jpg) | At the entry, or the primary part, movements are too fast for the eye. |
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![](pumpe_21675.jpg) | This means, that the contact is very short, but the changes are there. |
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![](pumpe_21820.jpg) | Of course, the movement can be vertical, and it can be instantaneous. |
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![](pumpe_22040.jpg) | The contact with the pendulum lasts for a tenth of the second, |
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![](pumpe_22280.jpg) | and on the other side, the changes are obvious. |
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