A motorcyclist rides in vertical circle in a hollow sphere of radius 5 m. Find the minimum speed required, so that he does not have any contact with the sphere at the highest point .

4.6 m / s

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7 m / s

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7.5 m / s

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8 m / s

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Solution

The correct option is B $7 m / s$
Given,

$r = 5 m$

$g = 9.8 m / s^{2}$

The minimum speed , $v = \sqrt{r g}$

$v = \sqrt{5 \times 9.8}$

$v = 7 m / s$
The correct option is B.

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A motorcyclist rides in vertical circle in a hollow sphere of radius 5 m. Find the minimum speed required, so that he does not have any contact with the sphere at the highest point .

The correct option is B 7 m/sGiven,r=5mg=9.8m/s2The minimum speed , v=√rgv=√5×9.8v=7m/sThe correct option is B.

The correct option is B $7 m / s$
Given,

$r = 5 m$

$g = 9.8 m / s^{2}$

The minimum speed , $v = \sqrt{r g}$

$v = \sqrt{5 \times 9.8}$

$v = 7 m / s$
The correct option is B.