1) Que doit faire Sandy pour trouver dans quel laboratoire travaille le voleur ? Fais une liste de matériel.
2) Peut-on émettre une hypothese d ce stade des recherches ? Justifie.
3) Voici les résultats de Sandy:
Test
Resultat
Solution inconnue soude
Précipité rouille
Solution inconnue -nitrate d'argent Rien
A partir de ces observations, rédige un compte rendu pour répondre à la
question suivante :

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.