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loris [4]
1 year ago
12

PLSLPSLLPSLPSLPS HELP I ONLY HAVE 5 MINS PLEASE

Physics
2 answers:
UkoKoshka [18]1 year ago
5 0

Answer:

0.19m/s²

Explanation:

Initial velocity(u) = 50×1000/60×60

=13.88 m/s

Final velocity(v) = 36.5×1000/60×60

=10.13 m/s

Acceleration(a) = v-u/t

=10.13-13.88/19.5

a= -0.19m/s²

-a = 0.19m/s²

The magnitude of retar dation is 0.19m/s²

frozen [14]1 year ago
3 0

Answer:

\sf 0.192\:ms^{-2}\:\:(3\:s.f.)

Explanation:

Given:

  • initial velocity (u) = 50.0 km/h
  • final velocity (v) = 36.5 km/h
  • time (t) = 19.6 seconds

First, <u>convert</u> the velocities into meters per second by dividing by 3.6:

\implies \sf 50.0\: km h^{-1}=\dfrac{50.0}{3.6}\:ms^{-1}= \dfrac{125}{9}\:ms^{-1}

\implies \sf 36.5\: km h^{-1}=\dfrac{36.5}{3.6}\:ms^{-1}= \dfrac{365}{36}\:ms^{-1}

To find the vehicle's <u>acceleration</u>, use one of the constant acceleration equations with the given values:

\implies \sf v=u+at

\implies \sf \dfrac{365}{36}=\dfrac{125}{9}+19.5a

\implies \sf \dfrac{365}{36}-\dfrac{125}{9}=19.5a

\implies \sf 19.5a=-3.75

\implies \sf a=-\dfrac{3.75}{19.5}

\implies \sf a=-0.1923076923...\:ms^{-2}

Therefore, the magnitude of acceleration is:

\implies \sf |a|=|-0.19230...|=0.192\:ms^{-2}\:\:(3\:s.f.)

Learn more about Constant Acceleration Equations here:

brainly.com/question/27976125

brainly.com/question/26241670

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