El límite de velocidad en una carretera internacional es de 80 mi/h. ¿Cuál es la equivalencia aproximada de esta velocidad en km/h, si una milla equivale a 1609 m?

a)83 km/s
b)41 km/h
c)104 km/h
d)9123 km/h
e)Na

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.