Numerical - Torque acting on crank, given force - Theory of Machines - 1

Q.  Calculate torque acting on the crank, if tangential force acting on the engine is 150 kN and 300 mm is the crank radius.
- Published on 06 Aug 15

a. 45 kN.m
b. 500 kN/m
c. 2 kN/m
d. none of the above

ANSWER: 45 kN.m

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    Discussion

  • Sravanthi   -Posted on 19 Oct 15
    - Torque acting on a shaft is defined as the product of crank effort and crank radius.

    - It is represented as T = FT . r

    Given: Crank effort or tangential force acting on the engine = 150 kN, Crank radius = 300 mm


    Torque on the shaft = Crank effort x crank radius

    = (150 x 103) x 300

    = 45 x 106 N.mm

    Therefore, torque acting on the shaft = 45 kN.m

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