Se dinamita una roca la cual se fragmenta en tres partes: m1= 12kg, m2= 25 kg y m3= 8 kg. Las dos primeras salen disparadas formando entre sí un ángulo de 50grados, con rapideces v1= 20 m/s y v2= 14 m/s. Determina: magnitud y dirección de la velocidad y la cantidad de movimiento del tercer fragmento: Utiliza un sistema de coordenadas rectangulares.

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Arrange the images in order to show how lake-effect snow occurs.

The energy equivalent of the rest mass of an electron is