the origin of this s = rθ ?????

3 ⤊

the origin of this s = rθ ?????

2007-09-15 11:43:34 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

It's the definition of angle.

2007-09-15 12:50:16 · answer #1 · answered by ZikZak 6 · 1⤊ 0⤋

s=rΘ is only true if Θ is measured in radians. Since there are 2π radians in a full circle (360°), and the circumference of a circle is given by 2πr, it follows that the arc length (s) of a part of a circle is the radius multiplieed by the subtending angle in radians.

HTH

Doug

2007-09-15 12:00:34 · answer #2 · answered by doug_donaghue 7 · 2⤊ 0⤋