You have a rod with a length of 146.4 cm. You prop up one end on a brick which is 3.8 cm thick. Your uncertainty in measuring these distances is ±0.05 cm. What is the angle that the rod makes with the table?
_______ degrees
What is the uncertainty in that angle?
________ degrees

Respuesta :

Answer:

[tex]\partial \theta = 0.003[/tex]

Explanation:

we know that

[tex]sin\theta = \frac{3.8}{146.4}[/tex]

[tex]\theta = sin^{-1} \frac{3.8}{146.4}[/tex]

[tex]\theta = 1.484°[/tex]

[tex]\theta = 1.484° *\frac{\pi}{180} = 0.0259 radians[/tex]

as we see that [tex]sin\theta = \theta[/tex]

relative error[tex] \frac{\partial \theta}{\theta} = \frac{\partial X}{X_1} +\frac{\partial X}{X_2}[/tex]

Where X_1 IS HEIGHT OF ROCK

[tex]X_2[/tex] IS THE HEIGHT OF ROAD

[tex]\partial X[/tex] = uncertainity in measuring  distance

[tex]\partial X = 0.05[/tex]

Putting all value to get uncertainity in angle

[tex]\frac{\partial \theta}{0.0259} = \frac{0.05}{3.8} +\frac{0.05}{146.4}[/tex]

solving for [tex]\partial \theta[/tex] we get

[tex]\partial \theta = 0.003[/tex]