Exercices sur le mouvement de translation
F3
Exercice 1
On pousse une caisse de poids...
Physics, 30.09.2021 01:00 mrhortert9348
Exercices sur le mouvement de translation
F3
Exercice 1
On pousse une caisse de poids P = 400 N, de A vers D, selon le trajet ABCD. Le parcours horizontal CD a pour
longueur L = 4 m. La caisse est soumise à une force de frottement f, d'intensité constante f= 50 N, opposé à
tout instant au vecteur vitesse du point M.
1) Calculer :
a) Le travail W() effectué par le poids P de la caisse le long du trajet ABCD:
b) Le travail W(F) de la force de frottement sur le même trajet.
2) Calculer pour le trajet en ligne AD;
a) Le travail W (P) du poids P
b) Le travail WF) de la force de frottement *
c) Conclure. On donne : a = 30° ; B = 45° H = 3 m et h = 1m
B
A А
H
С
Answers: 1
Physics, 22.06.2019 03:00
Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.
Answers: 2
Physics, 22.06.2019 14:30
Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity
Answers: 3
Physics, 22.06.2019 15:00
Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.
Answers: 1
Physics, 22.06.2019 18:00
Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u
Answers: 2
Mathematics, 08.10.2021 19:20
Biology, 08.10.2021 19:30
Business, 08.10.2021 19:30
Chemistry, 08.10.2021 19:30
Mathematics, 08.10.2021 19:30
Medicine, 08.10.2021 19:30
Mathematics, 08.10.2021 19:30
Chemistry, 08.10.2021 19:30