In a simple pendulum experiment for determination of acceleration due to gravity ( )
PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
In a simple pendulum experiment for determination of acceleration due to gravity ( g ), time taken for 20 oscillations is measured by using a watch of 1 second least count. The mean value of time taken comes out to be 30 s. The length of pendulum is measured by using a meter scale of least count 1 mm and the value obtained is 55.0 cm. The percentage error in the determination of g is close to:
(1) 0.7%
(2) 0.2%
(3) 3.5%
(4) 6.8%