JAMB - Physics (2011 - No. 7)
An object weighs 22 kg in water and 30kg in air. what is the upthrust exerted by the liquid on the object.
[g = 10 ms2]
[g = 10 ms2]
50 N
520 N
220 N
80 N
설명
upthrust = weight in air - weight in liquid = 30 x 10 - 22 x 10 = 300 - 220 = 80 N