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Mashcka [7]
3 years ago
8

An electric motor rotating a workshop grinding wheel at 1.06 102 rev/min is switched off. Assume the wheel has a constant negati

ve angular acceleration of magnitude 2.10 rad/s2. (a) How long does it take the grinding wheel to stop
Physics
1 answer:
kvasek [131]3 years ago
6 0

Answer:

t = 106π / 30*2.1

Explanation:

w_{i} = 1.06*10^{2}    => 106

    => 106 x 2π/60

    => 106/30π

∝ = -2.1 rad/sec²

w_{f} => 0

w_{f} = w_{i} + ∝t

∴ (w_{f} - w_{i}) / ∝ = t

t = 106π / 30*2.1

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