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Question

What is the speed at any instant of time is known as?


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Solution

Step 1. Instantaneous speed:

  1. The instantaneous speed of an object is defined as the speed of object at a particular moment of time.
  2. If the direction is also included with the speed, then it will be instantaneous velocity.
  3. The mathematical expression for instantaneous speed is Si=dsdt, where Si = instantaneous speed, ds= change in distance, dt= time interval.
  4. It is a scalar quantity.

Step 2. SI unit :

  1. m/s is the SI unit of instantaneous speed.
  2. The dimension of instantaneous speed is [ML1T-1]

Step 3. An illustrative diagram of the instantaneous speed


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