A metal sphere of radius r is dropped into a tank of water. As it sink at speed v, it experience a drag force F given by F= krv, where k is a constant. What are the SI base units of k?
Correct answer: C. kg m-1s-1
- A. kg m2s-1
- B. kg m2s-2
- C. kg m-1s-1
- D. kg ms-2
Explanation
The following is the solution:F=krv which is equal to F/rvk=F/rv=kgms-2/m.ms-1=kgm-1s-1.
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