Acrate having mass 50.0 kg falls horizontally off the back of the flatbed truck, which is traveling at 100 km/h. find the value of the coefficient of kinetic friction between the road and crate if the crate slides 50 m on the road in coming to rest. the initial speed of the crate is the same as the truck, 100 km/h.

An uplifted block of rock between two normal faults

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.