When does a pendulum have the greatest mechanical energy
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Ответ:
A swinging pendulum has its greatest kinetic energy and least potential energy in the vertical position in which its speed is greatest and height least.
It has its least kinetic energy and greatest potential energy at the extremities of its swing, in which its speed is zero and its height greatest. As the pendulum moves, energy is continuously passing back and forth between the two forms.
Neglecting friction at the pivot and air resistance, the mechanical energy (sum of kinetic and potential energies) of the pendulum is constant.
Ответ:
Most protists move with the help of flagella, pseudopods, or cilia. Some protists, like the one-celled amoeba and paramecium, feed on other organisms. Others, such as the one-celled euglena or the many-celled algae, make their food by photosynthesis. ... Theyuse pseudopods to move away from bright light or to trap food.