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Hoja de trabajo de física básica-usac

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Contiene problemas relacionados a la física básica universitaria con sus respuestas.

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UNIVERSIDAD DE SAN CARLOS DE GUATEMALA

FACULTAD DE INGENIERIA
ESCUELA DE CIENCIAS
DEPARTAMENTO DE FISICA



Nombre:_________________________________________ FISICA BASICA 1S2022

Carné:_________________ Sección: ____________ Entrega: Miércoles 23/03

Profesor:____________________________ Auxiliar:_______________________________

PROBLEMA No. 1: Un objeto de 4.00 Kg está unido a una varilla vertical por medio de
dos cuerdas como se muestra en la figura. El objeto gira formando un círculo horizontal
con rapidez constante de 6.00 m/s. Determine:
a) La magnitud de la tensión en la cuerda superior. R// 108 N.
b) La magnitud de la tensión en la cuerda inferior. R// 56.2 N.

PROBLEMA No. 2: Considere un péndulo cónico con una pesa de 80.0 Kg unido a un
alambre ligero de 10.0 m que forma un ángulo de 5.00 0 con la vertical y gira con rapidez
angular constante. Determine:
a) La magnitud de la aceleración radial de la pesa. R// 0.857 m/s2
b) La rapidez angular de la pesa. R// 0.9916 rad/s
c) El período de rotación de la pesa. R// 6.336 m/s

PROBLEMA No. 3: Una trapecista se balancea sujetándose del extremo de una cuerda de 5.00
m de largo cuyo otro extremo se encuentra fijo en el techo. Si la trapecista tiene una masa de
85.0 Kg y su rapidez tangencial es de 8.00 m/s cuando la cuerda forma un ángulo de θ=30.0 0 con
la vertical. Determine: OBSERVACIÓN: aquí la trayectoria circular ocurre en el plano vertical.
a) La magnitud de la tensión en la cuerda en ese instante. R// 1.81KN
b) La magnitud de la aceleración radial de la trapecista. R// 12.8 m/s2

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