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Theory of Machines Miscellaneous

  1. A slider crank mechanism has slider mass of 10 kg, stroke of 0.2 m and rotates with a uniform angular velocity of 10 rad/s. The primary inertia forces of the slider are partially balanced by a revolving mass of 6 kg at the crank, placed at a distance equal to crank radius. Neglect the mass of connecting rod and crank. When the crank angle (with respect to slider axis) is 30°, the unbalanced force (in newton) normal to the slider axis is __________.
    1. 30
    2. 40
    3. 45
    4. 50
Correct Option: A

r =
0.2
= 0.1
2

Now m= 6kg
F = mr (102) sin θ
= 6 × 0.1 × 100 × sin 30° = 30 N



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