An engineer drops a small prototype sensor vertically into a column of dense fluid to test its hydrodynamic drag.
The mass of the sensor is 0.45 kg. The gravitational field strength is g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg. Calculate the weight of the sensor.
The engineer measures the time taken for the sensor to sink through a vertical distance of 0.85 m. The recorded times for three consecutive test drops are 2.48 s, 2.55 s, and 2.47 s. Calculate the mean time taken for the sensor to sink.
Use your calculated mean time to determine the mean speed of the sensor.