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Question

A bus moves with uniform velocity along a straight-line path. If the average velocity of the bus is 80kmh-1 then its instantaneous velocity at t=0 is _______ kmh-1.


A

70

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B

100

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C

80

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D

zero

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Solution

The correct option is C

80


Instantaneous velocity:

Instantaneous velocity is defined as the rate of change of position for a time interval that is very small (almost zero).

Find the Instantaneous velocity at 0s:

  1. When a body moves with a uniform velocity it covers equal distances in equal intervals of time.
  2. The body moves with the same velocity throughout its course.
  3. Hence, the instantaneous velocity at 0s is 80kmh-1

Therefore, the correct option is option C.


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