+1 vote
in Machine Dynamics by (34.3k points)
At which of the following angles in degrees does the tractive force attains a maximum value?

(a) 135

(b) 45

(c) 90

(d) 60

I have been asked this question in my homework.

This is a very interesting question from Variation of Tractive Force in section Balancing of Reciprocating Masses of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
Correct choice is (a) 135

To elaborate: The tractive force is maximum or minimum when (cos θ – sin θ) is maximum or minimum, differentiating it with respect to theta gives tan θ = -1

hence maximum/minimum value occurs at 135 or 315 degrees.

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