Can someone help with these?
1 answer:
<h3>Answer:</h3>
3. 0.0125 V
4. change in time, ∆t
<h3>Explanation:</h3>3. Faraday's law says ...
With suitable units, the magnetic flux Φ is the product of the magnetic field strength and the area of the loop. So ...
EMF = (∆B/∆t)·A = (0.250 T/s)·(0.05 m²) = 0.0125 V
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4. Refer to the discussion for problem 3. EMF is proportional to the change of flux with respect to time.
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Answer:
0.76
Explanation:
we are given:
radius (r) =5.7 m
speed (s) = 1 revolution in 5.5 seconds
acceleration due to gravity (g) = 9.8 m/s^{2}
coefficient of friction (Uk) = ?
we can get the minimum coefficient of friction from the equation below
centrifugal force = frictional force
m x r x ω^{2} = Uk x m x g
r x ω^{2} = Uk x g
Uk =
where ω (angular velocity) =
= = 1.14
Uk = = 0.76