What sign convention does Doc Physics use?Group of answer choicesDownward positiveIt's not clear from the videoUpward positive

The sign convention used by Doc Physics can be a point of confusion when learning mechanics. Generally, in physics, sign conventions can vary based on the context, especially regarding motion and forces.

1. Downward positive: This convention often applies in situations involving gravitational forces, where downward motion is considered positive, aligning with the direction of acceleration due to gravity.

2. Upward positive: This is commonly used in scenarios where the focus is on projectile motion or when analyzing forces acting upward, such as tension in a rope or the thrust of a rocket. In this case, upward directions are treated as positive values.

3. It's not clear from the video: This option reflects that Doc Physics may not have explicitly stated a convention, leaving room for interpretation based on the examples provided.

To determine the correct answer, it would be best to refer back to Doc Physics' video content and analyze the context in which directions are discussed.