# 12-129. The car starts from rest at s =0 and increases itsspeed at a, =magnitude of acceleration becomes 20 m/s?. At whatposition s does this occur?4 m/s2. Determine the time when the%3DDetegrssd nis8lo bosnogorbon i natwp = 40 m%3D

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Specifically a dynamics problem. Question and diagram in pic below. help_outlineImage Transcriptionclose12-129. The car starts from rest at s =0 and increases its speed at a, = magnitude of acceleration becomes 20 m/s?. At what position s does this occur? 4 m/s2. Determine the time when the %3D Dete grssd nis 8lo bos nogorbon i natw p = 40 m %3D fullscreen
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Step 1

The car starts from rest at s = 0 and increases its speed at the tangential acceleration The final acceleration is 20 m/s2.

Now, from the equation of motion, Step 2

The value of normal acceleration is given by Step 3

Now, the acceleration is given as 20 m/s2, with the help of this the value of distance s can be calculated. ...

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