NEET > Physics Class 11 > Average & Instantaneous Speed & Velocity
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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