The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in the pulley, and the connecting rope is very light. 
Definitions:
Pooled Estimator
A method used to estimate a common mean or variance from two or more samples, especially in t-tests involving independent samples with assumed equal but unknown variances.
Confidence Interval
A type of estimate computed from the statistics of observed data, which might contain the true value of the unknown population parameter.
Two-Wheeled Bicycle
A vehicle consisting of two wheels held in a frame one behind the other, propelled by pedals and steered with handlebars attached to the front wheel.
Population Distributions
The distribution of a particular characteristic (e.g., age, height, test scores) across all individuals within a larger group or population.
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