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belka [17]
3 years ago
9

Calculate the maximum absolute uncertainty for R if:

Physics
1 answer:
erma4kov [3.2K]3 years ago
7 0

Answer:

 ΔR = 5 s

Explanation:

The absolute uncertainty or error in an expression is

       ΔR = | \frac{dR}{dB} | ΔB + | \frac{dR}{dA} | ΔA

the absolute value guarantees to take the unfavorable case, that is, the maximum error.

We look for the derivatives

       \frac{dR}{dB} = 1

       \frac{dR}{dA} = -1

we substitute

       ΔR = 1 ΔB + 1 ΔA

       

of the data

       ΔB = 3 s

       ΔA = 2 s

         

       ΔR = 3 + 2

       ΔR = 5 s

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Answer:

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Where F_ab is the force in cable AB

F_ab = 762.7 × 0.686

F_ab = 523.2 N

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