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Q.

An air compressor is powered by a 200 rad/s electric motor using a V-belt drive. The motor pulley is 8cm in radius, and the tension in the V-belt is 135N on one side and 45N on the other. The power of the motor will be

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a

14.4 kW

b

28.8 kW

c

1.44 kW

d

2.88 kW

answer is A.

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Detailed Solution

τ=RF1-F2=8×10-2×90 N-m P=τω=8×10-2×90×200 watt =1440=1.44kw

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