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Elis [28]
2 years ago
8

A student is observing a pendulum swinging back and forth. Each time it swings, the pendulum bob reaches a lower maximum, and ev

entually it comes to rest and hangs straight down vertically. What happens to the total energy of the pendulum? Does this violate the law of conservation of energy? Explain your reasoning.
Physics
2 answers:
vodomira [7]2 years ago
7 0

Answer:

the pendulum loses momentum and stops because of gravity and wind resistance. it does not violate the law of conservation of energy because it is not gaining any more momentum than what it had started with

Explanation:

RSB [31]2 years ago
6 0
The total energy of the pendulum stays the same. This does not violate the law of conversation of energy because that law states energy cannot be created/destroyed and the total amount of energy has stayed the same.
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The final velocity of the train after 8.3 s on the incline will be 12.022 m/s.

Answer:

Explanation:

So in this problem, the initial speed of the train is at 25.8 m/s before it comes to incline with constant slope. So the acceleration or the rate of change in velocity while moving on the incline is given as 1.66 m/s². So the final velocity need to be found after a time period of 8.3 s. According to the first equation of motion, v = u +at.

So we know the values for parameters u,a and t. Since, the train slows down on the slope, so the acceleration value will have negative sign with the magnitude of acceleration. Then

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