Find the time taken by the truck to move 1 metre

[chwala]

Homework Statement

See attached.

Relevant Equations

kinematics

Unless i am missing something; there is an error with the textbook

It ought to be ,

$t= \sqrt {\dfrac{1}{0.04}}= \sqrt 25 = 5$ seconds.

 

[BvU]

Why ?

 

[pasmith]

Homework Statement: See attached.
Relevant Equations: kinematics

Unless i am missing something; there is an error with the textbook

View attachment 339804

It ought to be ,

$t= \sqrt {\dfrac{1}{0.04}}= \sqrt 25 = 5$ seconds.

If $u = 0$ then $$s = \tfrac12 at^2 \quad \Rightarrow \quad t = \sqrt{\frac{2s}{a}}$$ as the textbook has, not $t = \sqrt{s/a}$ as you are suggesting.

 

[chwala]

If $u = 0$ then $$s = \tfrac12 at^2 \quad \Rightarrow \quad t = \sqrt{\frac{2s}{a}}$$ as the textbook has, not $t = \sqrt{s/a}$ as you are suggesting.

Let me take a break! Cheers @pasmith