He tune-up specifications of a car call for the spark plugs to be tightened to a torque of 47 n⋅m . you plan to tighten the plugs by pulling on the end of a 25-cm-long wrench. because of the cramped space under the hood, you'll need to pull at an angle of 115 ∘ with respect to the wrench shaft. you may want to review (page

207.4 N

Explanation:

The torque  on a body is

 where r is the radius vector from the point of rotation to the point at which force F is applied.

The product of r and F is equal to the product of magnitude of r and F multiplied by the sine of angle between both vectors.

Therefore, torque is also given by

Where is the angle between r and F.

Use the expression of torque.

Substitute L for r in the equation

Where L is the length of the wrench.

Making F the subject

Force required to pull the wrench is given as,

Substitute  for , 25 cm for L, and 115o for