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Effectus [21]
2 years ago
9

To test the performance of its tires, a car travels along a perfectly flat (no banking) circular track of radius 130 m. The car

increases its speed at uniform rate of at ≡ d |v| dt = 5.22 m/s 2 until the tires start to skid. If the tires start to skid when the car reaches a speed of 25.6 m/s, what is the coefficient of static friction between the tires and the road?
Physics
1 answer:
marysya [2.9K]2 years ago
4 0

Answer:

0.739

Explanation:

If we treat the four tire as single body then

W ( weight of the tyre ) =  mass × acceleration due to gravity (g)

the body has a tangential acceleration = dv/dt = 5.22 m/s², also the body has centripetal acceleration to the center = v² / r

where v is speed 25.6 m/s and r is the radius of the circle

centripetal acceleration = (25.6 m/s)² / 130 = 5.041 m/s²

net acceleration of the body = √ (tangential acceleration² + centripetal acceleration²) = √ (5.22² + 5.041²) = 7.2567 m/s²

coefficient of static friction between the tires and the road = frictional force / force of normal

frictional force = m × net acceleration / m×g

where force of normal = weight of the body in opposite direction

coefficient of static friction = (7.2567 × m) / (9.81 × m)

coefficient of static friction = 0.739

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3 years ago
The coefficient of cubical expansion of a substance depends upon
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3 years ago
What is the wavelength associated with an electron with a velocity of 4.8X10s m/s? (Mass of the electron is 9.1X10-31kg)?
amid [387]

Answer:

1.52 nm

Explanation:

Using the De Broglie wavelength equation,

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So, λ = h/p

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substituting the values of the variables into the equation, we have

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4 0
3 years ago
The frequency of a wave is 200 Hz. The wavelength is 0.1 m. What is the period of the wave?
Aleks04 [339]
The formula for the period of wave is: wave period is equals to 1 over the frequency.waveperiod=\frac{1}{frequency}
To get the value of period of wave you need to divide 1 by 200 Hz. However, beforehand, you have to convert 200 Hz to cycles per second. So that would be, 200 cyles per second or 200/s.
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wave period= 1/ 200/s

get the reciprocal form of 200/s which is s/200

then you can start the actual computation:

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this would give us an answer of 0.005 s. 
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GenaCL600 [577]
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7 0
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