Một hệ gồm hai vật giống nhau có khối lượng m1 = m2 = 200 g dính với nhau bởi một lớp keo mỏng. Một lò xo nhẹ có chiều dài tự nhiên là 40 cm, treo thẳng đứng với đầu trên cố định, đầu dưới gắn vào m1. Gia tốc trọng trường g = 10 m/s2. Khi hệ vật cân bằng, lò xo dài 44 cm. Nâng hệ vậtthẳng đứng đến khi lò xo có chiều dài 38 cm rồi thả nhẹ. Biết hai vật rời nhau khi lực kéo giữa chúng đạt tới FM = 3,5 N. Biên độ dao động của vật m1 khi rời khỏi vật m2 là A. 5,1 cm. B. 4,3 cm. C. 6,2 cm. D. 3,2 cm

Will you chech and finish these for me, because i am stumped with them.

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.