Question

The zero velocity of a particle at any instant does not necessarily imply zero acceleration at that instant. Elaborate

Answer 1

Answer:

Elaboration

Explanation:

Consider you are moving in a car from left to right at velocity 10 km/hr, now suddenly you put the car in reverse mode at full retarding acceleration of 10 m/sec² (decelration). your car will still keep moving from left to right till its velocity becomes zero (10 9 8 ..... 3 2 1 0) and because of high acceleration your car will start moving from right to left (0 1 2 ..... 10 11 and so on) backwards as soon as velocity of our car becomes zero. Thus when the instant your velocity was zero your accelration was still 10 m/sec².

Answer 2

The zero velocity of a particle at any instant does not necessarily imply zero acceleration at that instant

Explanation:

acceleration  is change in velocity wrt time

a = dv/dt

even if v = 0    and dv/dt ≠ 0

then acceleration will be there

( it mostly happens in case where velocity change Direction so acceleration is there but velocity comes to zero before changing Direction)

Any object thrown vertically upward

is under constant acceleration of g  

and at top its velocity becomes zero

and then changes direction.

At top point for that instant Velocity of particle is zero but acceleration is there

Hence we can say that The zero velocity of a particle at any instant does not necessarily imply zero acceleration at that instant

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