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kherson [118]
3 years ago
14

A coin mass 0.005 kg is dropped from a height of 3 m. How much mechanical energy does it have right before it hits the ground ?

Physics
1 answer:
lesya692 [45]3 years ago
6 0
Mechanical energy equals the sum of potential and kinetic energy. During the process, all PE converts into KE, assuming air resistance is neglected. So, the mechanical energy does not change and is equal to the initial potential energy.
ME
=mgh
=0.005 x 9.81 x 3
=0.147J
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bagirrra123 [75]

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7 0
3 years ago
The period of a pendulum is measured 16 times. The average value of the period over these 16 trials is calculated to be 1.50 sec
marin [14]

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The additional trials needed is 48 trials

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\epsilon = \frac{\sigma}{\sqrt{n} }

To reduce the standard error to 0.03 s, let the additional number of trials = x

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Therefore, the additional trials needed is 48 trials.

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3 years ago
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hodyreva [135]

Answer:

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