Question

در
A boll roiled an ico with a
velocity of 14ms comes to rest
after travelling 40 m. find the coefficient of friction


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Answer 1

Answer:

Here, u=14 m/s, v=0, s= 40 m

Let, g=9.8 m/s2

Using third equation of motion, we get

v^2=u^2+2as

or, v^2−u^2=2as

0−(14)2=2×a×40

So, a=−14×14/80=−2.45

Now, using the formula of coefficient of friction, we get

μ=a/g=2.45/9.8=0.25

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Answer 2

Answer:

The answer of this question is very easy to find out it will b-4.9 m/s