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When to double the parameter to get delta v
Posted: Mon Oct 22, 2018 10:07 pm
by Tinisha 1G
In the homework, there are questions that asked for the minimum uncertainty of the object's position, and when it said minimum, the solution's manual did not double the parameter of the velocity. Although, when it does not say minimum, they double the parameter? Does the word "minimum" play a role in whether we double the parameter or not?
Re: When to double the parameter to get delta v
Posted: Tue Oct 23, 2018 1:20 am
by Chem_Mod
Uncertainty in velocity is the difference between the highest and lowest possible values for the velocity. In some cases, velocity is given as a value
some error. In this case, you would have to double that error to find the total uncertainty in velocity.
Re: When to double the parameter to get delta v
Posted: Tue Oct 23, 2018 5:36 pm
by Andrew Sun 3F
if a question says the speed is 3.24 +/- 0.06 m/s, would delta V be 0.12 m/s?
Re: When to double the parameter to get delta v
Posted: Tue Oct 23, 2018 6:03 pm
by Jeremy_Guiman2E
Yeah, as Chem Mod said above, "uncertainty in velocity is the difference between the highest and lowest possible values for the velocity".
So given 3.24 +/- 0.06 m/s, our highest possible value is 3.30 and our lowest is 3.18.
The difference of the above values is 0.12 m/s which is what delta v/uncertainty in velocity would be, so yes, it would be 0.12 m/s.