The wrench you are working with does no! loosen a nut, your car sometimes succeed by slipping a length of pipe over the end of the wrench and pushing at the end of the pipe. why does this work? the pipe effectively lengthens the wrench. you can exert the same force to the end of the pipe, and get a greater torque became of the longer lever arm. the pipe effectively applies extra torque duo to elastic force of its deformation. this extra torque you to loosen the nut. the pipe effectively decreases the torque that holds the nut. you need to apply less torque to loosen it, so you can succeed by applying the same farce as before.

Answer (d) valerie rides her bike south at 8 kilometers per hour///owen jogs south at 8 kilometers per hour ;

Answer: a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same sign as the  -4.0  µc charge.======electricstatic force between two point charges  is given by    where k is coulomb's constant,  8.99×10⁹  n·m²/c², q₁ and q₂ are the point charges, and r is the distance between the two point charges.assign positive to q₁let q₁ =  6.0 µc, q₂ = -4.0  µc, q₀ represent the charge at the origin, and q₃ represent this new charge to place.the charge at the origin q₀ would experience the following force f₀₁ from q₁, with r = 6.0 m (note that 1  µc = 10⁻⁶ c)    the force from q₂    the force from q₃    the net force on the origin charge, q₀, has to be zero for no electrostatic forcehaving an equation where k and q₀ can be divided out of the equation will allow us to solve for q₃    isolating:     a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same as the  -4.0  µc charge