What should we know to find the exact position of a moving body Relate...
How to Find the Exact Position of a Moving Body
Understanding Motion
To find the exact position of a moving body, we need to first understand the concept of motion. Motion is the change in position of an object with respect to time. The position of the object is described in terms of its distance from a reference point, usually called the origin.
Measuring Motion
To measure motion, we need to know the distance covered by the object and the time taken to cover that distance. The distance covered by the object is measured in meters (m) or centimeters (cm), and the time taken to cover that distance is measured in seconds (s) or minutes (min).
Calculating Average Speed
We can calculate the average speed of the object by dividing the distance covered by the time taken. The formula for average speed is:
Average speed = distance/time
For example, if a car travels a distance of 100 km in 2 hours, its average speed is:
Average speed = 100 km/2 hours = 50 km/h
Calculating Instantaneous Speed
The instantaneous speed of the object is the speed at a particular instant of time. To calculate the instantaneous speed, we measure the distance covered by the object in a very short interval of time. The formula for instantaneous speed is:
Instantaneous speed = distance covered in a very short time interval/time interval
Using Graphs to Represent Motion
We can also use graphs to represent the motion of an object. The distance-time graph shows the distance covered by the object at different points in time. The slope of the distance-time graph gives the speed of the object.
The velocity-time graph shows the velocity of the object at different points in time. The slope of the velocity-time graph gives the acceleration of the object.
Conclusion
To find the exact position of a moving body, we need to measure the distance covered by the object and the time taken to cover that distance. We can calculate the average speed and instantaneous speed of the object using the distance and time measurements. We can also use graphs to represent the motion of the object and calculate its acceleration.