SSC JE Mechanical Engineering 2014 Set 2 Paper

Question : 147 of 200

Marks: +1, -0

What torque is Nm is required to give 3 m

^{3}

/s of water, a moment of momentum, so that it has a tangential velocity of 3 m/s at a distance of 1.8 m from the axis ?

Solution:

Given Q = 3m

^{3}

/s
distance r = 1.8 m
V = 3 m/s
torque T = ρ Q v.r
= 1000 × 3 × 3 × 1.8
= 16200 N-m

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