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For a belt transmission dynamometer, if the diameter of pully is doubled and speed of rotation is halved, then the new braking power will be ________

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in Machine Dynamics by (34.3k points)
For a belt transmission dynamometer, if the diameter of pully is doubled and speed of rotation is halved, then the new braking power will be ________

(a) Halved

(b) Doubled

(c) Quadrupled

(d) Remain same

I had been asked this question in my homework.

My query is from Belt Transmission Dynamometer-Froude or Throneycraft Transmission Dynamometer topic in portion Brakes and Dynamometers of Machine Dynamics

1 Answer

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by (38.6k points)
Correct answer is (d) Remain same

The explanation: Braking power of the engine is given by the equation

B.P = (T1-T2)πDN/60

if Diameter is doubled and speed is halved it will have no effect in the existing brake power.

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