Un automóvil se mueve con velocidad constante de 50 km/h por una carretera. Pasada la hora, otro móvil sale en la misma dirección a 80 km/h. ¿Dónde se encontrará el primer móvil a la hora? ¿En qué momento se encontrarán los vehículos?

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

None. nothing. zero. zilch.