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Questions and Answers
What does velocity measure?
What does velocity measure?
- The acceleration of an object
- The speed of an object without direction
- The distance traveled over time
- The change in position per unit of time (correct)
Which of the following best describes how velocity differs from speed?
Which of the following best describes how velocity differs from speed?
- Velocity includes direction, while speed does not. (correct)
- Velocity is measured in meters only.
- Velocity is always greater than speed.
- Velocity measures only average speed.
Which unit is commonly used to express velocity?
Which unit is commonly used to express velocity?
- Feet per minute
- Miles per gallon
- Meters per hour (correct)
- Kilometers per second
Velocity is calculated using which of the following formulas?
Velocity is calculated using which of the following formulas?
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What does a change in velocity indicate?
What does a change in velocity indicate?
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Study Notes
Velocity Measurement
- Velocity measures the rate at which an object changes its position.
- It combines both speed and direction, making it a vector quantity.
Difference Between Velocity and Speed
- Velocity is directional; speed only indicates how fast an object moves regardless of its direction.
- Two objects can have the same speed but different velocities if they travel in different directions.
Common Units of Velocity
- The most commonly used unit to express velocity is meters per second (m/s).
- Other units can include kilometers per hour (km/h) or miles per hour (mph).
Velocity Calculation
- Velocity is calculated using the formula:
- Velocity (v) = Displacement (d) / Time (t)
- Displacement refers to the change in position from the starting point to the endpoint.
Change in Velocity
- A change in velocity indicates an acceleration or deceleration of an object.
- It can occur due to a change in speed, direction, or both during motion.
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