Admin How do you find the experimental force?
According to Newton�s Second Law, the resultant force on an object is directly proportional to the mass of the object and the acceleration that the object undergoes. Mathematically, this is expressed as ΣF = Ma where, in SI units, F is in Newtons (N), M is in kilograms (kg), and a is in m/s2.
Is Timing human error?
Human error on using stopwatch Even though stopwatches are created to be more accurate, humans are still prone to make mistakes every time they use one. Normally, humans will take about 180–200 milliseconds to detect and respond to visual stimulus.
How could reaction time introduce error into an experiment?
One source of error is our reaction time. This is a random error: we may delay too long in starting the watch, or delay too long in stopping the watch. In practice, the reaction times will not be the same in repeated measurements; our measured times will be randomly distributed around the true time.
How are the forces represented using the force table?
Force Table. Object: To demonstrate that forces can be represented by vectors and that when equilibrium is achieved the vector sum of all the forces acting on an object is zero. The magnitude of each force on the string is given by the weight attached and the direction is the as the direction of the string.
What is human reaction time uncertainty?
Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s, due to human reaction time at the start and stop moments.
What is the average human reaction time?
The average reaction time for humans is 0.25 seconds to a visual stimulus, 0.17 for an audio stimulus, and 0.15 seconds for a touch stimulus.
Is time a random or systematic error?
What are the sources of systematic or random errors?
| Error | Systematic or Random error |
|---|---|
| Reaction time | Random error. |
| Measurement errors from insufficient precision | Random error. |
Why is time measured when conducting an experiment?
First, let’s notice that our human reaction time (200 ms) is much longer than the precision of the stopwatch (10 ms), so we can ignore the uncertainty due to the precision of our measurement and focus on the accuracy. That is, our trigger finger, and not the stopwatch, is the limiting factor in the experiment.