The tune-up specifications of a car call for the spark plugs to be tightened to a torque of 49 N⋅m . You plan to tighten the plugs by pulling on the end of a 28-cm-long wrench. Because of the cramped space under the hood, you’ll need to pull at an angle of 105 ∘ with respect to the wrench shaft.
1 Answer
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49 = 28*F*sin 75
F = 49/(0.28*0.966) = 181.16 N
