EJERCICIO 1 x=100mm ˙ x=60mm/seg Solución xy= b 2 xy=40 2 → xy= 1600 x=100 → y=16 Derivando ˙ x y + ˙ y x =0 (60)(16)+ ˙ y(100)=0 → ˙ y=-9.6mm/seg De ˙ x y + ˙ y x =0 Derivamos ¨ x y +2 ˙ x ˙ y +x ¨ y=0 Si ¨ y= 0 ¨ x (16)+2(60)(-9.6)+(100)(0)=0 → ¨ x= 72mm/ seg 2 v = ( ˙ x; ˙ y) = (60;-9,6) → | v|=60.763 mm/ seg 2 e t = v → | v| = ( 60 60.763 ; −9.6 60.763 ) → e n =( 9.6 60.763 ; 60 60.763 )