Resolvemos los siguientes planteamientos. a- Un ventilador de techo está girando a razón de 240 rpm y su radio es 1,2 m. Calcula su período y velocidad tangencial en el extremo de sus paletas.

b- Una esferita de acero se mueve sobre un riel circular con un radio de giro de 5 metros y su velocidad angular es 0,628 /s. Determina su período.

c- Un cuerpo efectúa 300 vueltas sobre una circunferencia en 2,5 min. Calcula:

1- El período del movimiento

2- La frecuencia en Hz

d- Una rueda de 60 cm de radio recorre una trayectoria rectilínea con una velocidad de 86,4 km/h sin deslizarse.

1- ¿Con qué velocidad angular gira esa rueda?

2- ¿Cuál es la frecuencia de esa rueda?

e- Un automóvil recorre una pista circular de 80 metros de radio MCU, con una velocidad tangencial de 72 km/h. Calcula:

1- La velocidad angular

2- El período

3- La frecuencia en rpm

f- La rueda de un parque de diversiones gira con un período de 20 segundos y las personas sentadas en los asientos se mueven con una velocidad tangencial de 4, 71 m/s. Halla:

1- La frecuencia de giro, en rpm.

2- El radio de la rueda

g- Una rueda completa 150 giros por minuto. Calcula:

1- La frecuencia

2- El período

3- La velocidad angular de la rueda

4- La velocidad escalar de un punto situado a 12 cm del eje de la rueda

What elements are found in the inner and out core of the earth? the correct layers of earth's interior from the top to the center? what is the unwanted material that is removed from a mine called? how much stronger is an earthquake that registers 5 on the richter as opposed to 2? what occurs at a convergence plate boundary? the majority of the the earth's rock what is the most common element found in the earth's crust? what element is found in pyrite that contributes to acid mine drainage? why must mining companies post bond prior to permitting? how are bacteria being used in treating effluent from mines? what is a problem of acid mine drainage in rivers and soils? what do tectonic plates move on? why is gold smelting so damaging? how are artesian wells formed? where is dammed water colder than the river it flows into? what is one of the problems of uncontained aqueducts? what is the largest use of industrial water? underground sand and gravel formations that can store water? what type of water test measure acidity? which type of water test for cloudiness from suspended solids? what water test measures the amount of calcium and magnesium? these are all problems of coal power plants all of the following are advantages of riparian lands along rivers what type of water would be the warmest and have the least amount of dissolved oxygen? the zone of aeration is

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.