Un ilusionista de 60 kg se deja caer desde la cima de una plataforma de 20 m de altura. Ignore la resistencia del aire. Determine la energía cinética en el punto 2 (cuando la altura es de 15 m).
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Which of the following represents an upside-down image?

Aparticle of mass m is projected with an initial velocity v0 in a direction making an angle α with the horizontal level ground as shown in the figure. the motion of the particle occurs under a uniform gravitational field g pointing downward. (a) write down the lagrangian of the system by using the cartesian coordinates (x, y). (b) is there any cyclic coordinate(s). if so, interpret it (them) physically. (c) find the euler-lagrange equations. find at least one constant of motion. (d) solve the differential equation in part (c) and obtain x and y coordinates of the projectile as a function of time. (e) construct the hamiltonian of the system, h, and write down the hamilton’s equations (canonical equations) of motion.

What are the theoretical properties of a gas at a temperature of 0 kelvin?