What device helps limit peak deceleration forces during a fall by absorbing energy?

• A. Deceleration unit
• B. Lanyard
• C. Harness
• D. Carabiner

Answer: (A)

When a fall occurs, the system must limit the force that reaches the body by absorbing some of the fall energy. A deceleration unit is designed to do exactly that: it dampens and dissipates energy so the peak deceleration is reduced, typically by elongating or using an energy-absorbing mechanism that converts kinetic energy into deformation, heat, or stored energy. This keeps the force transmitted to the climber within safer limits.

A lanyard mainly serves as the connection between harness and anchor; unless it includes an energy-absorbing feature, it doesn’t actively limit peak deceleration. The harness is the body attachment point and distributes load rather than absorbing energy. The carabiner is just a connector and does not absorb energy to reduce peak forces.