Final answer:
When the woman lifted the barbell incorrectly, the discs in her lower back exerted excessive force on her upper body, potentially leading to injury. Proper lifting technique and understanding the role of muscles and joints are crucial to prevent such injuries.
Step-by-step explanation:
In biomechanics, when a person lifts a heavy object using incorrect technique, it can result in excessive forces being exerted on the lower back. The force exerted by the vertebrae on the spine can lead to potential injury risks and may cause damage to the discs in the lower back.
To calculate the newtons of force exerted by the disc in the woman's lower back on her upper body, we would need more specific information about the lifting technique and the weight being lifted.
Analyzing the role of muscles and joints in the lifting process and discussing the potential injury risks associated with the lift are important considerations when determining the force exerted on the body.