A shaft shown in the figure rotates at a rate of 100 rev/min against a constant torque of 1000 N-m. The power required to rotate the shaft is

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ISRO VSSC Technical Assistant Mechanical 25 Feb 2018 Official Paper

Answer 1

Concept:

Power transmitted can be calculated by:

\(P={2π NT\over 60}\)

where P = Power (W), N = Speed of rotation (RPM), and T = Torque (N-m).

Calculation:

Given:

N = 100 RPM, T = 1000 N-m

\(P={2π NT\over 60}\)

\(P={2\times 3.14\times 100\times 1000\over 60}\)..................(where π = 3.14)

P = 10466.66 W ≈ 10.47 kW