Final answer:
The term for the hammer's tendency to move in a straight line during the hammer throw event is projectile motion.
Step-by-step explanation:
The term for the hammer's tendency to move in a straight line during the hammer throw event is projectile motion. Projectile motion refers to the motion of an object thrown or projected into the air, subject only to the acceleration of gravity. The hammer, when released, follows a curved path in the air, but its horizontal component of motion allows it to move in a straight line before hitting the ground.