Sorry bn sinhalen type karanna amarui sahena wela yanawa e nisa mehema kynnam
ara underline karala thyna part eka thynne..eke thynne nishchalawa thiyena wayu anshu wahanaye gatunata passe wahanaye pravegayama labaganna thwaranaya karanawa kyla..ethakota e wayu anshu walatath 30ms-1ka pravegayak labenw
ethana gamyatha wenasin wahanaya matha kriyakarana prathirodi balaya hoyaganna puluwanne
wahanaya niyatha pravegayen chalanaya wenw kynne (prakarshana balaya=prathirodi balayane)..anna e widihata hithala P=FV ta adesha karaddi F ta (ii) hoyagaththa prathirodi balaya dala V ta 30 danna...methanadi api hadanne wahane mulu kshamathawaya gaman karanna wayawenw kyla...passe 15% kyla danagaththata eka adala wenne na mkd ahanne niyatha wegaya pawathwa ganeemata awshya kshamathawaya kylane...e kynne prathirodi balayata erehi kshamathawaya