Laboratoria de fuerza de roce

[pic]
DEPARTAMENTO DE MATEMÁTICA, ESTADÍSTICA Y FÍSICA.

GUÍA E INFORME DE LABORATORIO Nº 07
“FUERZA DE ROCE”.

EXPERIENCIA

Rectángulo de madera

Altura = 39.9 cm
44.4 cm40.5 cm
[pic]= 14.6 cm

Aceleración = 254.3 cm/seg2
255.4 cm/seg2
268.5 cm/seg2
[pic]=259.4 cm/seg2

Celular

Altura = 29.1 cm
28.5 cm
31.6 cm
[pic]=29.73 cm

Aceleración = 188.7 cm/seg2
188.3 cm/seg2
183.2 cm/seg2
[pic]=186.73cm/seg2

Instrumento de laboratorio

Altura = 46 cm
33.1 cm
43.4 cm[pic]= 40.83 cm

Aceleración = 344.4 cm/seg2
366.7 cm/seg2
349.3 cm/seg2
[pic]= 353.4cm/seg2

Actividad A

*Rectángulo de madera
H =41.6 cm
L = 150 cm[pic]= tan [pic]

Cos [pic] = [pic] = [pic][pic] = [pic] = [pic] = 0.96077,
Cos ([pic]) = 0.96077
[pic]= arcos(0.96077) = 16.102
[pic]= tan [pic]
[pic]= 0.28867

*celular

H=29.7 cm
L = 150 cm

[pic]= tan [pic]
Cos [pic] = [pic] = [pic][pic] = [pic] = [pic] = 0.9802,

Cos ([pic]) = 0.9802
[pic]= arcos(0.9802) = 11.42
[pic]= tan [pic]
[pic]=0.202

* Instrumento de laboratorio

H = 40.83 cm
L = 150 cm

[pic]= tan [pic]

Cos [pic] = [pic] = [pic][pic] = [pic] = [pic] = 0.9622,

Cos ([pic]) = 0.9622
[pic]=arcos(0.9622) = 15.804
[pic]= tan [pic]
[pic]= 0.2830

Actividad B

Coeficiente de roce cinético

*Rectángulo de madera
|θ |a (m/s2) |µk = tan(θ) - a / (g cos (θ) |
| 16.102|980  |0.02386  |

*celular
|θ |a (m/s2) |µk = tan(θ) - a / (g cos (θ) |
|11.42 |186.73 | 0.0083|

*instrumento de laboratorio
|θ |a (m/s2) |µk = tan(θ) - a / (g cos (θ) |
|15.804 |353.46 | 0.09179 |

Análisis

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