Question

A metal cube of edge 5cm and density 9.0gcm^-3 is suspended by a thread so as to be completely immersed in a liquid of density 1.2gcm^-3. find the tension in thread. ( take g=10ms^-2)​

Answer 1

Answer

Side of the cube = 5 cm

So, its volume, V = a = 125 cm3

Mass of cube = V x d = 125 x 9 = =

1125 g

Weight = mg = 1125 x 1000 =

1125000 dyne

Now, cube is immersed is liquid,

..buoynat force = V pg = 125 x 1.2 x

1000 = 150000 dyne

So, Tension = apparent weight =

(1125000 – 150000) dyne =

975000 dyne = 9.75 N

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Answer 2

Answer:

Answer

Side of the cube = 5 cm

So, its volume, V = a = 125 cm3

Mass of cube = V x d = 125 x 9 = =

1125 g

Weight = mg = 1125 x 1000 =

1125000 dyne

Now, cube is immersed is liquid,

..buoynat force = V pg = 125 x 1.2 x

1000 = 150000 dyne

So, Tension = apparent weight =

(1125000 – 150000) dyne =

975000 dyne = 9.75 N

Explanation:

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