A torsion bar is designed to _____ to absorb shocks. abend in half bdevelop micro-cracks along its length cexpand its diameter dtwist

The correct answer is d) twist.

Explanation

A torsion bar is a type of spring typically used in the suspension systems of vehicles. The primary function of a torsion bar is to absorb shocks and provide stability and control during driving. It does this by twisting when a force is applied. When the vehicle encounters bumps or uneven surfaces, the torsion bar undergoes shear deformation. Its ability to twist allows it to absorb energy from the impact while maintaining its structural integrity, thus helping to smooth out the ride for passengers.

The other options are not applicable:

• a) bend in half: This does not accurately describe the function of a torsion bar.
• b) develop micro-cracks along its length: While micro-cracks can occur due to fatigue over time, it is not a design function.
• c) expand its diameter: This is not how torsion bars operate, as they rely on twisting rather than expansion.

In conclusion, twisting is the critical mechanism that enables torsion bars to effectively absorb shocks and enhance the comfort and handling of the vehicle.