+610 The force needed to loosen a bolt varies inversely with the length of the handle of the wrench used. A wrench with a handle length of 9 inches requires 375 pounds of force to loosen a certain bolt. A wrench of 15 inches will require how many pounds of force to loosen the same bolt?
+36915 Each handle will exert the same FOOT-POUNDS of torque to loosen the bolt...
9/12 ft * 375 lbs = 281.25 foot-pounds of torque required
15/12 ft * ? lbs = 281.25 ft-lbs solve for ? = 225 lbs
