Physics
Two-Dimensional Motion flashcards
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- What is a scalar?Vectors
- A quantity described by magnitude and unit without direction.
- What is a vector?Vectors
- A quantity with magnitude and direction.
- What is a vector component?Vectors
- A signed contribution along a chosen axis.
- How are vectors added by components?Vectors
- Add corresponding components separately.
- How is an opposite vector formed?Vectors
- Negate every component.
- When does the Pythagorean magnitude formula apply?Vectors
- For perpendicular components.
- What is vertical acceleration?Projectile Motion
- Downward g.
- What is zero at the highest point?Projectile Motion
- Vertical velocity.
- What connects the horizontal and vertical equations?Projectile Motion
- The same elapsed time.
- What is air resistance?Circular Motion
- A force from movement relative to air.
- What is terminal speed?Circular Motion
- An approximately steady falling speed when drag balances weight.
- Is gravity present in orbit?Circular Motion
- Yes; it helps curve the path.
- What does apparent weightlessness often mean?Circular Motion
- Little or no support force during free fall.
- Why is uniform circular motion accelerated?Circular Motion
- Velocity direction changes.
- What direction is centripetal acceleration?Circular Motion
- Toward the center.
- Is centripetal force an extra interaction?Circular Motion
- No; it is the net inward role of actual forces.
- What path begins if the inward force is removed?Circular Motion
- A tangent path in the inertial-frame idealization.