Question

A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a
drag force F given by F = kr v, where k is a constant.
What are the SI base units of k?

Answer 1

m a = k r v note :m is mass

k = m a/ (rv)

kg m
========== note: m is meters
s^2 m m/s

kg /( m s)

Answer 2

Yes