In uniform circular motion, how does the acceleration change when the speed is increased by a factor of 3? When the radius is decreased by a factor of 2?

Respuesta :

Answer:

The acceleration will become 9/2 times.

a' =9/2 a

Explanation:

We know that acceleration of a particle when it is moving in the circular path is given as

[tex]a=\omega^2\ r[/tex]

r=radius

ω= angular speed

If the speed ω '= 3 ω

If the radius ,[tex]r'=\dfrac{r}{2}[/tex]

The final acceleration =a'

[tex]a'=\omega^2'\ r'[/tex]

[tex]a'=(3\omega)^2\times \dfrac{r}{2}[/tex]

[tex]a'=9\omega^2\times \dfrac{r}{2}[/tex]

[tex]a'=\omega^2\times \dfrac{9r}{2}[/tex]

[tex]a'= \dfrac{9r}{2}\times \omega^2\times r[/tex]

[tex]a'=\dfrac{9}{2}a[/tex]

Therefore the acceleration will become 9/2 times.

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