The tune-up specifications of a car call for the spark plugs to be tightened to a torque of 35 Nm. You plan to tighten the plugs by pulling on the end of a 21-cm-long wrench.Because of the cramped space under the hood, you’ll need to pull at an angle of 125° with respect to the wrench shaft.
With what force must you pull?
Known variables:
Torque(τ): 35 Nm
position r relative to its axis of rotation: 21 cm or .21m
Angle: 125°
To find the Force, you would need to derive from the torque equation.
τ = Frsinθ
Just solve for F, if you rearrange the equation, it would look a little something like this.
F= τ/rsinθ
F= 35/.21( sin(125) )
F= 203 N or200 N (two significant figures)
F= 200 N
Leave a Reply