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Average & Instantaneous Speed & Velocity Video Lecture | Physics Class 11 - NEET

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FAQs on Average & Instantaneous Speed & Velocity Video Lecture - Physics Class 11 - NEET

1. What is the difference between average speed and instantaneous speed?
Ans. Average speed is calculated by dividing the total distance traveled by the total time taken, while instantaneous speed refers to the speed at a particular moment in time. Average speed gives an overall picture of the motion, while instantaneous speed provides information about the speed at a specific instant.
2. How is velocity different from speed?
Ans. Velocity is a vector quantity that includes both speed and direction, whereas speed is a scalar quantity that only represents the magnitude of motion. For example, a car traveling at 60 km/h to the north has a velocity of 60 km/h north, while its speed is simply 60 km/h.
3. Can the average speed of an object be zero?
Ans. Yes, the average speed of an object can be zero if it returns to its starting point after moving in different directions. For example, if a person walks 1 km north and then walks 1 km south, their total displacement is zero, and therefore their average speed is also zero.
4. How can you calculate instantaneous velocity?
Ans. Instantaneous velocity can be calculated by finding the derivative of the position function with respect to time. In simpler terms, it is the slope of the position-time graph at a specific point. Mathematically, v(t) = d/dt [x(t)], where v(t) represents the instantaneous velocity at time t and x(t) represents the position at time t.
5. What is the difference between speed and velocity in everyday life?
Ans. In everyday life, speed is commonly used to describe how fast an object is moving, such as the speed of a car. On the other hand, velocity is used to describe not only the speed but also the direction of an object's motion. For example, if a person is walking towards the east, their velocity would include both the speed and the eastward direction.
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