In an Amputee wheelchair, why are the wheels placed posteriorly?

In an Amputee wheelchair, why are the wheels placed posteriorly?

• A. To shift the center of gravity posteriorly
• B. To increase seat width
• C. To enhance propulsion by moving anterior
• D. To reduce ground clearance

Answer: (A)

Wheel position is used to tune balance and propulsion by moving the center of gravity relative to the drive wheels. In an amputee user, the distribution of mass is altered, so placing the wheels a bit toward the back shifts the system’s center of gravity toward the rear drive wheels. This increases the load on the drive wheels, improving traction and making forward propulsion easier, while also enhancing overall stability and reducing the chance of tipping when starting to move or negotiating uneven surfaces. Other options don’t address balance or propulsion in the same way: moving the wheels forward would reduce weight over the drive wheels and make propulsion harder, and increasing seat width or reducing ground clearance aren’t about altering the center of gravity for better control.

Wheel position is used to tune balance and propulsion by moving the center of gravity relative to the drive wheels. In an amputee user, the distribution of mass is altered, so placing the wheels a bit toward the back shifts the system’s center of gravity toward the rear drive wheels. This increases the load on the drive wheels, improving traction and making forward propulsion easier, while also enhancing overall stability and reducing the chance of tipping when starting to move or negotiating uneven surfaces. Other options don’t address balance or propulsion in the same way: moving the wheels forward would reduce weight over the drive wheels and make propulsion harder, and increasing seat width or reducing ground clearance aren’t about altering the center of gravity for better control.