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sdas [7]
3 years ago
7

How do you calculate elastic potential energy

Physics
1 answer:
Nimfa-mama [501]3 years ago
5 0
U=1/2kx2

This image sums it up
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From fastest to slowest, rank the speeds of the balls 1 s after being thrown. Rank the speeds of the balls from fastest to slowe
Rus_ich [418]

Explanation:

From the given figure,

Mass of ball A is 4.9 kg and its initial speed is 8 m/s.

Mass of ball B is 1.9 kg and its initial speed is 14 m/s.

Mass of ball C is 0.7 kg and its initial speed is 2 m/s.

We need to find the final speed of the balls 1 s after being thrown. They all are thrown upward under the action of gravity. The equation of motion is : v = u -gt, g = 10 m/s²

For ball A,

v = 8-10(1) = = -2 m/s (downward)

For B,

v = 14-10(1) = 4 m/s (upward)

For C,

v = 2-10(1) = -8 m/s (downward)

It means the ranking is B>A>C i.e. the speed of ball B is the most and that of C is least.

All the balls are moving under the action of gravity. It would mean that the acceleration for all balls is same i.e. 10 m/s²

8 0
3 years ago
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There is a constriction in a clinical thermometer give reasons​
Marianna [84]
  • There is a constriction made in a clinical thermometers.
  • As constriction stops the mercury inside the thermometer to drop back towards the bulb of thermometer.
  • So there is constriction used in clinical thermometers to prevent usage of alcohol or mercury into bulb
5 0
2 years ago
When momentum is conserved it is called _____. (multiple choice)
Klio2033 [76]

Answer:

Based off the word "conserved" I would say

A. Conservation of Momentum.

Explanation:

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3 years ago
A hypothesis is an assumption or a best guess that
rusak2 [61]

Definition: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
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You exert a force of 25 newtons while you move a rock 15 meters. How much work did you perform?
leonid [27]
Work Done = Force x Distance Moved
Work Done = 25 x 15 = 375 Joules
4 0
3 years ago
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