Torque : This can be defined as a force that tend to rotate or twist a body. The S.I unit of torque is N.m. The expression of torque is given as,
T = F×d Equation 1
Where T = Torque on the car's nut. F = The minimum force exerted on the car, d= distance between the force and the nut.
make F the subject of the equation,
F = T/d Equation 2
Given: T = 35 N.m, d = 27 cm = 0.27 m.
Substitute into equation 2
F = 35/0.27
F = 129.63 N.
Hence the minimum force exerted by the mechanic to loosen the nut = 129.63 N
F = 130 N
Convert first 27 cm to m.
27 cm x 0.01 m / 1 cm = 0.27 m
Calculate the torque using T = Fd
Derive to find force F
F = T /d
= 35 N.m / 0.27 m
= 130 N