Uploaded by Fernando Filippi

TP4 ecuaciones 2

advertisement
P x – FR = 0
N – Py = 0
FR = µ e . N
FR = P x
FR = Py
𝑚𝑔 . 𝑐𝑜𝑠𝛼
Px = µe . Py => µe = PPyx = 𝑚𝑔 . 𝑠𝑒𝑛𝛼 = tgα
∆µe = error trigonométrico
µe = tgα
µe = tg14°
µe = 0,25
µ = µe ± ∆µe
µ max =
µ min =
(𝑐𝑜𝑠𝛼)𝑚𝑎𝑥
(𝑠𝑒𝑛𝛼)𝑚𝑖𝑛
(𝑐𝑜𝑠𝛼)𝑚𝑖𝑛
(𝑠𝑒𝑛𝛼)𝑚𝑎𝑥
=
=
𝑐𝑜𝑠12°
𝑠𝑒𝑛12°
𝑐𝑜𝑠16°
𝑠𝑒𝑛16°
= 0,21
= 0,29
µ=
µ max + µ min
= 0,25
2
∆µ =
=>
∆µ max − ∆µ min
= 0,02
2
µ =0,25 ± 0,02
Este es el más preciso.
Download