Une plateforme à roulettes de 48 kg est accrochée à un ressort horizontal dont la constante de rappel est de 20 N/m : l'autre extrémité du ressort est fixée au mur. Le frottement entre la plate-forme et le plancher est négligeable. On éloigne la plate-forme du mur afin d'allonger le ressort de 1.5 m, puis on la lâche (vitesse initiale nulle). Béatrice, dont la masse est de 65 kg, marche à côté de la plate-forme en s'efforçant d'aller à la même vitesse ; quand la plate-forme est au centre de l'oscillation, elle monte dessus. Calculez l'énergie mécanique de Béatrice et de la plate-forme avant qu'elle n'y monte.
Answers: 3
Other questions on the subject: Physics
Physics, 21.06.2019 18:30, mariatorres7
Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart
Answers: 1
Physics, 22.06.2019 05:10, zionnahl
Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.
Answers: 3
Physics, 22.06.2019 10:30, Bayabbay8380
Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.
Answers: 1
Physics, 22.06.2019 15:00, weridness80
For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat
Answers: 1
You know the right answer?
Une plateforme à roulettes de 48 kg est accrochée à un ressort horizontal dont la constante de rappe...
Questions in other subjects:
Mathematics, 19.03.2020 23:57
English, 19.03.2020 23:57
