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valentinak56 [21]
3 years ago
10

A 500kg car skids to a stop at a traffic light, leaving behind a 18.25m skid mark as it comes to a rest. Assuming that the car i

s travelling at 14.5m/s and only the friction from the tires on the roadway stop the vehicle. Find the coefficient of friction
Physics
1 answer:
Nastasia [14]3 years ago
6 0

Answer:

Coefficient of friction will be 0.587

Explanation:

We have given mass of the car m = 500 kg

Distance s = 18.25 m

Initial velocity of the car u = 14.5 m/sec

As the car finally stops so final velocity v = 0 m/sec

From second equation of motion

v^2=u^2+2as

0^2=14.5^2+2\times a\times 18.25

a=-5.76m/sec^2

We know that acceleration is given by

a=\mu g

5.76=\mu\times  9.81

\mu =0.587

So coefficient of friction will be 0.587

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      I_{total}=I_{body} + 2 I_{arm}

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The total mass is 64 kg, 1/8 corresponds to the arms and the rest to the body

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The mass of the arms is

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