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Answer on Mechanics | Relativity Question for aruba

Question #16150
A car starts from rest on a curve with a radius of 100m and accelerates at 1.0m/s^2 .Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1m/s^2 ?
Expert's answer
Angle (in radians) X = (2 * Pi) * L / (2 * Pi * R) = L / R
Total acceleration
at = a + V^2 / R
V = sqrt( (at - a) * R )
t = a / V = a / sqrt( (at - a) *
R )
X = L / R = (a * t^2 / 2) / R = (a * (a / sqrt( (at - a) * R ))^2 /
2)
/ R = (a * (a^2 / ( (at - a) * R ) / 2) / R = (a^3 / ( 2 * (at - a)
*
R^2 )) = 1^3 / ( 2 * 1.1 * 100^2 ) = 1 / 22000
Answer: 1 / 22000
radians.

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