A cube of sides 0 1m hangs freely from a string... - JAMB Physics 1997 Question
A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm-2, g = 10ms-2]
A
1000 N
B
700 N
C
110 N
D
10 N
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Correct Option: D
Volume of water displaced = volume of cube
therefore, 0.1 x 0.1 x 0.1 = 0.001m3
mass of H2O = 0.001 X 1000
= 1kg
upthrust = mg
= 1 x 10
=10N
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