1. Clasificar los siguientes movimientos, completando la tabla, como movimiento rectilíneo uniforme o como movimiento rectilíneo uniformemente variado a. Un auto que parte del reposo y aumenta contantemente su velocidad.
b. Una persona que recorre distancias iguales en tiempos iguales.
c. Un hombre que camina en línea recta todas las mañanas a velocidad contante.
d. Un móvil que viaja trae una velocidad y se detiene al ver un semáforo.

Movimiento rectilíneo uniforme Movimiento rectilíneo uniformemente variado

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

The softest and hardest minerals are: softest hardest