Question #110222

A car accelerates from the rest to a speed of 10m/s in 4 seconds. It then decelerates to rest in 2 seconds.

A)draw the speed-time for the car?

B)work out the total distance travelled?

A)draw the speed-time for the car?

B)work out the total distance travelled?

Expert's answer

*Distance when car accelerates from the rest:*

"s\\begin{matrix} \\\\ 1\\end{matrix}=\\dfrac{a\\times t^2}{2}=\\dfrac{2.5\\times 4^2}{2}=20(meters)"

*Distance, when car accelerates to the rest:*

"s\\begin{matrix} \\\\ 2\\end{matrix}=V\\times t+\\dfrac{a\\times t^2}{2}=10\\times 2-\\dfrac{5\\times2^2}{2}=10(meters)"

*Together:*

"s=s\\begin{matrix} \\\\ 1\\end{matrix}+s\\begin{matrix} \\\\ 2\\end{matrix}=30(metres)"

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## Comments

Muhammed Mustafa Aslan22.04.20, 21:11Thank you for everything

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