Question

If the friction of the pin on which the pinion rotates is neglected, which of the following force is equal to the tangential effort exerted by the spur gear on the pinion

(a) Radial effort exerted by the spur gear on the pinion

(b) Tangential reaction of the annular gear on the pinion

(c) Radial reaction of the annular gear on the pinion

(d) Piston effort

I have been asked this question in an interview for internship.

I would like to ask this question from Epicyclic-train Dynamometers topic in division Brakes and Dynamometers of Machine Dynamics

Answer 1

Right answer is (b) Tangential reaction of the annular gear on the pinion

Explanation: If the friction of the pin on which the pinion rotates is neglected, then the tangential effort P exerted by the spur gear on the pinion and the tangential reaction of the annular gear on the pinion are equal.