A javelin thrown by an athlete is in ________ motion.

Correct option is D

Correct Answer is (D) Curvilinear

A javelin thrown by an athlete follows a curvilinear path, meaning its motion is along a curved trajectory. This is because the javelin is subject to both horizontal motion (due to the athlete's throw) and vertical motion (due to the force of gravity). The combined effect of these forces results in a parabolic or curved trajectory.

• Curvilinear motion involves movement along a curve, which can be either in a parabolic path (like the javelin) or another curved path.
• The horizontal velocity remains constant, while the vertical velocity changes due to gravity.
• This type of motion is typical for projectiles, including javelins, baseballs, and other objects thrown into the air.

• Oscillatory: Refers to motion that repeats itself in a regular cycle (e.g., a pendulum).
• Periodic: Refers to motion that repeats at regular intervals but does not necessarily have a curved path.
•  Rectilinear: Refers to motion in a straight line, which is not applicable to the javelin throw.