Preliminary Problem $12\mathrm{.}1-$ Enhanced $-$ with Hints and Feedback

Figure

$1$ of $1$ Part A

If $s=(2t^3)m,$ where $t$ is in seconds, determine $v$ when $t=7s.$

Express your answer to three significant figures and include the appropriate units.

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Part B

If $v=(5s)\frac{m}{s},$ where $s$ is in meters, determine $a$ at $s=5m.$

Express your answer to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$a=$ Part K

When $t=0$ the particle is at $A.$ In four seconds it travels to $B,$ then in another six seconds it travels to $C.$ The origin

of the coordinate is at $O.$ Determine the average speed if $d_1=8m$ and $d_2=16m.($Figure $1)$

Express your answer to three significant figures and include the appropriate units.

View Available Hint$($s$)$

$(v_{sp}{)}_{\text{a}\text{v}\text{g}}=$