The bolts on the cylinder head of an engine require tightening to a torque of 86 m·N. If a wrench is L = 30 cm?

The bolts on the cylinder head of an engine require tightening to a torque of 86 m·N. If a wrench is L = 30 cm long,

1.) what force perpendicular to the wrench must the mechanic exert at its end? (N)

2.) If the six-sided bolt head is 15 mm in diameter, estimate the force applied near each of the six points by a socket wrench (N)

2 Answers

  • Torque = force * arm

    Get consistent units

    86 nm = F 0.30 m

    F = 286.67 N

    1/6 of 86 = 14.33 N*m

    T = F*L

    14.33 = F * 0.015 m

    F = 955.33 N (At least I think that is what the question asks)

  • for the second half, make sure to use 0.0075m, (the radius), instead of the diameter (0.015m).

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