Final answer:
Greater dynamic forces are encountered when lifting and moving a load with a higher center of gravity, as more effort is needed to maintain stability. Lowering the center of gravity and widening the base of support can enhance stability and reduce these forces.
Step-by-step explanation:
Greater dynamic forces are present when you are lifting and moving a load with a higher center of gravity. This is because a higher center of gravity makes the load less stable, and hence more force is required to control and balance it. Conversely, lowering the center of gravity increases stability and reduces the forces involved. For example, when a person bends while keeping their back erect and uses their legs to lift, this action lowers the center of gravity, creating smaller forces in the back, which is important for preventing injury.
Stability can also be increased by expanding the base of support, such as by spreading the feet farther apart. These principles of balance and dynamics can be particularly important for individuals who lift and carry loads for a living, as they help in preventing falls and reducing strain on the body.