🔍 Key Concepts
• Thrust bearing function – it transmits axial (fore‑and‑aft) force from the shaft to the ship’s structure
• Difference between shaft rotation (torque) and shaft thrust (axial force)
• How the illustration uses curved arrows vs straight arrows to show different kinds of motion/force
💭 Think About
• Look at the Rotating View: which arrows show the shaft turning around its axis, and which arrows show the shaft being pushed fore‑and‑aft?
• Think about how the propeller pushes the ship ahead: in that condition, which way will the shaft try to move, and which arrow in the figure matches that direction?
• Compare the arrows labeled F, G, H, and J: which pair best represents one circular motion plus one straight‑line axial push?
✅ Before You Answer
• Identify which labels (F, G, H, J) are drawn as curved arrows around the shaft – these represent rotation.
• Identify which labels (F, G, H, J) are drawn as straight arrows along the shaft centerline – these represent thrust direction.
• Before choosing, verify that in your selected pair, one arrow must be curved (rotation) and one arrow must be straight (thrust).