un tren toma una curva cuyo radio es de 500 [m], con una rapidez de 20m/s. ¿Cuál es el valor de la fuerza lateral que los rieles deben ejercer sobre un carro de 25.000 [kg], para que este logre girar?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)