Solution: (i) Spanner has a long handle to produce larger turning moments when a small force is applied at the handle end. (ii) The steering wheel is of large diameter to decrease the amount of force required to produce the turning effect.

Why is a spanner with a longer handle is easier to use than one with a shorter handle?

A long handled wrench loosens a bolt more easily than a short handled one because there is a longer lever arm. A longer lever arm will give a greater torque than a shorter one with the same applied force.

Why do we prefer spanner of longer arm?

Torque or turning effect due to a force is maximum when r is maximum. We prefer to use a wrench with long arm because when the length of the arm(r) is long, the force (F) required to produce a given turning effect ( x ) is smaller. Hence, a nut can be unscrewed easily.