The minimum coefficient of friction to avoid slippage of the coin is 0.23.
<h3>
Minimum coefficient of friction</h3>
The minimum coefficient of friction can determined from the maximum speed of the coin.
ma = μmg
mv²/r = μmg
v²/r = μg
v² = μgr
μ = v²/(gr)
μ = (ωr)²/(gr)
μ = ω²r/g
μ = (7.95² x 0.035)/(9.8)
μ = 0.23
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The unit 'mb' means millibar which is equivalent to 1/1000 of 1 bar. To convert the units from bar to atmospheres (atm) and to inches Hg (inHg), we need to know the conversion factors.
a.) 1 atm = 1.01325 bar
0.92 mb(1 bar/1000 mbar)(1 atm/1.01325 bar) =<em> 9.08×10⁻⁴ atm</em>
b.) 1 bar = 29.53 inHg
0.92 mb(1 bar/1000 mbar)(29.53 inHg/1 bar) =<em> 0.027 inHg</em>
Answer:
D
Explanation:
I think the answer is D, because of hallucinations
It is called the atmosphere
Answer:
Explanation:
Assuming that air resistance is negligible then there will be no acceleration in the x-direction as there are no unbalanced forces in the x-direction.
In the y-direction there will be only one force acting and that will be gravity, thus the resultant acceleration will be the acceleration due to gravity (or down)
((Newton's first law - a body will continue in it's state of rest or unaccelerated motion unless acted on by an unbalanced force; Newton's second law - F=ma))