The width of a photograph is 4 inches. Tori measures its width using the two rulers, both of which measure in inches. Which stat
ement is true about the accuracy and precision of the rulers? The measurement found using Ruler 1 is more accurate and more precise. The measurement found using Ruler 2 is more accurate and more precise. The measurement found using Ruler 1 is more accurate but less precise. The measurement found using Ruler 1 is more precise but less accurate.
2 answers:
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The positions when the particle reverses direction are:
The acceleraton of the paticle when reverses direction is:
Why?
To solve the problem, we need to remember that if we derivate the position function, we will get the velocity function, and if we derivate the velocity function, we will get the acceleration function. So, we will need to derivate two times.
Also, when the particle reverses its direction, the velocity is equal to 0.
We are given the following function:
So,
- Derivating to get the velocity function, we have:
Now, making the function equal to 0, to find the times when the particle reversed its direction, we have:
We know that the particle reversed its direction two times.
- Derivating the velocity function to find the acceleration function, we have:
Now, substituting the times to calculate the accelerations, we have:
Now, substitutitng the times to calculate the positions, we have:
Have a nice day!