En una competencia automovilística, Germán tarda 38 s en dar una vuelta a la pista cuya longitud es 2660 m (debes aplicar la ecuación de velocidad que es =

= =

2660

38

), mientras que Felipe va a una velocidad de 200 km/h. ¿Cuál de los

dos pilotos va más rápido? ¿Cuál tardará más tiempo den dar una vuelta completa

a la pista?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.