Physics, 20.12.2019 15:31 yohannaG4315
Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. what effect does this have on collisions?
the change in momentum needed to stop the gymnast is increased.
the change in momentum needed to stop the gymnast is decreased.
the force exerted by the floor on the gymnast decreases.
the force exerted by the floor on the gymnast increases
Answers: 2
Physics, 22.06.2019 00:20, pooperjooper
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.
Answers: 2
Physics, 22.06.2019 11:10, axxpjr12
Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.
Answers: 3
Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. what...