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An electric motor rotating a workshop grinding wheel at a rate of 1.13 102 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.20 rad/s2.
(a) How long does it take for the grinding wheel to stop?
s
(b) Through how many radians has the wheel turned during the interval found in (a)?
rad
The Earth has a static electric field almost everywhere on the surface of about 100 V/m, pointed downward, called the "Fair weather field". Calculate the total charge induced on the Earth's surface
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Find out the induced emf in the loop at an instant
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