Question

4. A body of mass 1 kg is tied with one end of a wire and it is
whirled in horizontal plane. Cross-sectional area of the
wire is 10m2 and breaking stress is 4.0 x 108N/m?
By how much maximum angular speed the body can be
whirled?​

Answer 1

Answer:

till the time stress in wire can withstand centripetal force M omega square R.

FORCE 《 Breakingbstressx Crosse sectional Area of wire

Length of Wir= 1 m

Ang Vekocity = w

Mass at end = 1 Kg

BS = 4x 10^8 N per m^2= 400 N/ mm^2

radius of wire = 10 mm^2

so 1. w^2.1= 3.14 x100x 400= 12 56 x 10^4

w = 354 rad per sec

frequency = 56 cycles per second.