Question

from physics solve in detail

Answer 1

hello friend...!!

accordingly to the questions we should find the time when the particle attains zero velocity.

S = 6t^2 - t^3 ( displacement)

we know velocity V = ds / dt.

V= d( 6t^2 - t^3 ) / dt.

V = 12t - 3t^2

given velocity is zero , so

0 = 12t -3t^2

3t^2 - 12t = 0

3t( t - 4 ) = 0

implies,

t = 0 and t = 4s

therefore the time at which the particle attains zero velocity is 4 seconds.

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hope it helps...!!!