Physics · LAWS OF MOTION

A stone of mass \( 0.2 \text{ kg} \) tied to the end of a string is whirled in a horizontal circle of radius \( 0.5 \text{ m} \) with a constant speed of \( 4 \text{ m s}^{-1} \). The tension force provided by the string is:

1. A
   \( 6.4 \text{ N} \)
2. B
   \( 1.6 \text{ N} \)
3. C
   \( 3.2 \text{ N} \)
4. D
   \( 12.8 \text{ N} \)