Two carts with magnets attached, make up a system. The mass of one cart and the magnet is 1kg and the mass of the other cart and magnet is 5 kg. They are initially at rest on a frictionless track and then are released causing the two magnets to repel one another. Each is given an initial speed of 0.5 m/s. Once the carts are separated, the space between them is large enough to make the magnetic forces negligible. The track is slanted such that one side is slightly lower than the other.

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

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