Physics And Measurement Question 189
Question: A student measures the time period of 100 oscillations of a simple pendulum four times. The data set is 90 s, 91 s, 95 s and 92 s. If the minimum division in the measuring clock is 1 s, then the reported mean time should be
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Measured time period of 100 oscillations are 90 sec, 91 sec, 95 sec and 92 sec.
Mean value of time=
Mean absolute error
But the least count of the measuring clock is 1 sec, so it cannot measure up to 0.5 second, so we have to round it off.
So mean error will be 2 second. Hence men time
