$At the farthest point the velocity of particle will be zero. \ Differentiating the given equation of position and equating it with zero:$$\begin{aligned}x(t) &=5 t^{3}-9 t^{2}+7 \\x^{\prime}(t) &=15 t^{2}-18 t \\0 &=15 t^{2}-18 t \\t(15 t-18) &=0 \\t &=0 \\t &=\frac{18}{15}=1.2 \mathrm{~s}\end{aligned}$

$$$Thus, at $t=1.2 \mathrm{~s}$ particle will be at the farthest point. \\\\\underline{Justification:}\\The particle moves towards the left from $t \in[0,1.2)$. After that particle keeps moving in the positive x-direction.$

5 0

1 year ago

Explain how the evolutionary and socio-cultural perspectives might explain the use of corporal punishment on children.?

valkas [14]

Children will associate there unacceptable behaviour with getting spanked, and the purpose is to dissuade them from partaking in that behaviour in the future.

5 0

3 years ago

Read 2 more answers

What happens to Gillespie's barn in as i lay dying

Art [367]

During the night they move Addie's coffin from under an apple tree across the yard from the house to the barn. This barn is visible from the back porch of the house, where Dewey Dell and Vardaman sleep. In an attempt to end the journey, Darl burns it down.

7 0

2 years ago