A student starts swinging a stone in a circle at a velocity of 9.0 meters per second. The force required to keep the stone traveling in a circle at that speed would be 80. Newtons. If the mass of the stone is
3.0 kilograms, what would be the minimum safe distance from the student?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas