The stylus of a phonograph record exerts a force of 7.7 x 10-2N on a groove of radius 10-5m. Compute the pressure exerted by the stylus on the groove
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Correct Answer: Option A
Explanation:
Pressure P = F/A
= F/Ï€r2
= 2.45 x 108 Nm-2
Pressure P = F/A
= F/Ï€r2
| = | 7.7 x 10-2 |
| π x (10-5)2 |
| = | 7.7 x 10-2 |
| π x 10-10 |
= 2.45 x 108 Nm-2