Tilted surface, very little friction 6. when is very low, acceleration is in one
ID: 1874987 • Letter: T
Question
Tilted surface, very little friction 6. when is very low, acceleration is in one direction, but for higher values of angle, the acceleration reverses direction. Using equation (5) predict the critical angle for reversal of acceleration (solve for when a-0). How did this compare to your data? M- 7. For accelerations measured at -2° or 3° your (% difference) was most likely larger than for 0 or 5° trials and your accelerations are less than predicted. This is due to a systematic error that is more apparent at the middle angles. What is the source of this error, and why does %difference increase for value of that are close to the critical angle?Explanation / Answer
6. given
a = g(m - Msin(theta))/(m + M)
then to find cricitcal angle of reversal
a = 0
hence
Msin(theta) = m
theta = arcsin(m/M)
hence critical angle is theta = arcsin(m/M)
7. readings near critical angle have more error as near critical angle the relative values of variables ( like force and accelration) is very low hence making error large