Final answer:
Physical therapists require knowledge of physics to understand the mechanics of body movements and muscle function.
Step-by-step explanation:
A physical therapist does require knowledge of physics because it is essential for understanding the mechanics of body movements and muscle function. Physics knowledge helps physical therapists understand concepts such as muscle contraction, release of energy, and chemical reactions inside the body. By applying this knowledge, physical therapists can make informed decisions and design appropriate treatment plans for their patients.