Class 9 Exam > Class 9 Videos > Introduction to Acceleration
Introduction to Acceleration Video Lecture - Class 9
FAQs on Introduction to Acceleration Video Lecture - Class 9
| 1. What is acceleration? |  |
Acceleration is the rate at which an object's velocity changes over time. It is a vector quantity that includes both magnitude (how fast the velocity changes) and direction. It can be positive or negative, depending on whether the object is speeding up or slowing down.
| 2. How is acceleration calculated? | |
Acceleration can be calculated using the formula: acceleration (a) = change in velocity (Δv) / change in time (Δt). This formula measures how much an object's velocity changes in a given time interval.
| 3. What is the difference between speed and acceleration? | |
Speed refers to how fast an object is moving, while acceleration refers to how fast an object's velocity is changing. Speed is a scalar quantity that only considers magnitude, while acceleration is a vector quantity that includes both magnitude and direction.
| 4. How does acceleration affect motion? | |
Acceleration plays a crucial role in determining the motion of an object. If an object experiences a positive acceleration, it will speed up. On the other hand, if an object experiences a negative acceleration (also known as deceleration), it will slow down. The direction of acceleration also affects the object's motion as it can cause the object to change direction.
| 5. What are some real-life examples of acceleration? | |
Several real-life examples of acceleration include a car speeding up or slowing down, a ball falling towards the ground, a rocket launching into space, and a person riding a roller coaster. In all these cases, the velocity of the objects involved is changing, indicating the presence of acceleration.
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Oct 05, 2025
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