Question
Asked Jan 31, 2020
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Specifically a dynamics problem. Question and diagram in pic below.

12-129. 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
help_outline

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12-129. 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

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Expert Answer

Step 1

The car starts from rest at s = 0 and increases its speed at the tangential acceleration Mechanical Engineering homework question answer, step 1, image 1

The final acceleration is 20 m/s2.

Now, from the equation of motion,

Mechanical Engineering homework question answer, step 1, image 2

Step 2

The value of normal acceleration is given by

Mechanical Engineering homework question answer, step 2, image 1

Step 3

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

Mechanical Engineering homework question answer, step 3, image 1

...

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