The stylus of a phonograph record exerts a forc... - JAMB Physics 2003 Question
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
A
2.45 x 108 Nm-2
B
3.45 x 108 Nm-2
C
4.90 x 108 Nm-2
D
2.42 x 108 Nm-2
correct option: a
Pressure P = F/A
= F/πr2
= F/πr2
| = | 7.7 x 10-2 | ||
π x (10-5)2
= 2.45 x 108 Nm-2 |
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