GATE ME 2018 Set 1 — Question 51
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Engineering Mechanics → Mechanisms & Linkages → Four-Bar & Slider-Crank
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Question
A slider crank mechanism is shown in the figure. At some instant, the crank angle is and a force of N is acting towards the left on the slider. The length of the crank is mm and the connecting rod is mm. Ignoring the effect of gravity, friction and inertial forces, the magnitude of the crankshaft torque (in Nm) needed to keep the mechanism in equilibrium is _________ (correct to two decimal places).
Correct answer
1 to 1.2
Solution
Given:
Force on slider, N
Crank length, mm m
Connecting rod length, mm m
Crank angle,
NmRounding to two decimal places, the torque is 1.12 Nm.
Force on slider, N
Crank length, mm m
Connecting rod length, mm m
Crank angle,
1.Find the connecting rod angle using the sine rule:
2.The torque required for equilibrium is given by:
NmRounding to two decimal places, the torque is 1.12 Nm.
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