3 years ago

As you brake your bicycle, your velocity changes from 20 east m/s to 10 east m/s in 5 seconds.

Physics

1 answer:

Dmitry_Shevchenko [17]3 years ago

7 0

Answer:

-2 would be your acceleration

Explanation:.

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The acceleration of the car will be needed in order to calculate the time. It is important to consider that the final speed is equal to zero:

$v^2 = v_0^2 + 2ad\ \to\ a = \frac{-v_0^2}{2d} = -\frac{21.8^2\ m^2/s^2}{2\cdot 99\ m} = -2.4\frac{m}{s^2}$

We can clear time in the speed equation:

$v = v_0 + at\ \to\ t = \frac{-v_0}{a} = \frac{-21.8\ m/s}{-2.4\ m/s^2} = \bf 9.08\ s$

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