Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 10 (Q.No. 28)
28.
For the gear train,
If θ1 = 2 rad. clockwise and the torque of gear 1 is 10 lb-ft, what is the displacement and torque of gear 7.
If θ1 = 2 rad. clockwise and the torque of gear 1 is 10 lb-ft, what is the displacement and torque of gear 7.
rad CW, 7.5 lb-ft4 rad CW, 5 lb-ft
rad CW, 7.5 lb-ft
rad CW, 7.5 lb-ftAnswer: Option
Explanation:
Number of teeths on any gear is proportional to its radius,
i.e. 
and also displacement on all gear must be same
=> r1θ1 = r7θ7
=> 
=> 
∴ 
∴ 
rad CW
Now, work done by one gear is equal to other,
∴ T1θ1 = T7θ7
=> 
.
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