The image shows an infrared picture of a disc brake on a car after it has been driven and stopped. Heat is created when the brak
e pad comes in contact (rubbing) with the brake disc.
What causes the disc brake to heat up to almost 200°F ?
A)
bad tires
B)
friction
C)
solar energy
D)
electromagnetic energy
What causes the disc brake to heat up to almost 200°F ?
A)
bad tires
B)
friction
C)
solar energy
D)
electromagnetic energy
2 answers:
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Answer:
E=1.50\times 10^{-18}J
Explanation:
Energy of the one dimensional infinite well,
Given that,
For the ground state n=1,
Therefore energy is,
So the initial velocity is 15 m/s, the final velocity is 0 since it's at a complete stop and time is 10 seconds. Therefore:
Therefore, the acceleration is -1.5 m/s^2. The reason it's negative is due to the fact that the vector is going against it's original movement since it's decelerating.