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Acceleration Video Lecture - Class 9
FAQs on Acceleration Video Lecture - Class 9
| 1. What is acceleration? |  |
Acceleration is the rate at which an object changes its velocity over time. It is a vector quantity, meaning it has both magnitude and direction. In simpler terms, it refers to how fast an object's speed is changing.
| 2. How is acceleration calculated? | |
Acceleration can be calculated using the formula: acceleration (a) = change in velocity (Δv) / time taken (Δt). The unit of acceleration is meters per second squared (m/s^2).
| 3. What are the different types of acceleration? | |
There are three main types of acceleration:
1. Uniform acceleration: This occurs when an object's velocity changes by an equal amount in every equal time interval. It can be represented by a straight line on a velocity-time graph.
2. Non-uniform acceleration: This occurs when an object's velocity changes by different amounts in equal time intervals. It can be represented by a curved line on a velocity-time graph.
3. Negative acceleration (deceleration): This occurs when an object's velocity decreases over time, resulting in negative acceleration. It is also known as deceleration or retardation.
| 4. How does acceleration differ from velocity? | |
Acceleration and velocity are related but distinct concepts. Velocity refers to the rate at which an object changes its position in a specific direction, whereas acceleration refers to the rate at which an object changes its velocity. In other words, velocity includes both speed and direction, while acceleration only focuses on the change in speed.
| 5. What are some real-life examples of acceleration? | |
Some real-life examples of acceleration include:
1. A car accelerating from rest to a certain speed.
2. A plane taking off and gaining altitude.
3. A person riding a roller coaster and experiencing rapid changes in speed.
4. A ball dropped from a height and accelerating due to gravity.
5. A sprinter running and gradually increasing their speed.
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Nov 16, 2024 Last updated |
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