we choose a sewing machine. study and record observations and answer the following questions: 1. which parts of the machine move in translational motion? 2. which parts rotate, and how does rotational motion contribute to function? 3. what Forces (friction, weight, tension, torque) affect movement efficiency?
Answer (1)
Answer:1. Translational Motion: The parts that move in translational motion are: - The needle bar (up and down motion) - The presser foot (up and down motion)2. Rotational Motion*: The parts that rotate are: - The handwheel or motor shaft (rotates the main shaft) - The main shaft (transfers rotational motion to the needle bar and other mechanisms) - The bobbin hook or shuttle (rotates to form stitches)
