# A ball, filled with air has a volume of 500 cm^3. What should be the minimum force applied by a child to put it completely inside water? Take g=10 m/s^2.

2
by abcxyz

2015-03-04T20:52:50+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Volume of balloon (v)= 500cm³
If it is completely immersed in water, it will displace the same volume water.
So buoyant force would act on it in the upward direction.The child need to apply same amount of force as buoyant force to put it inside.

density of water = 1 g/cm³

So the child needs to apply 5N force to put it completely inside water.

(Note: The density of air is negligible compared t density of water. So you should ignore the mass of air.)

2015-03-05T10:31:57+05:30
volume of balloon (v)= 500cm³
If it is completely immersed in water, it will displace the same volume water.
So buoyant force would act on it in the upward direction.The child need to apply same amount of force as buoyant force to put it inside.

density of water = 1 g/cm³

So the child needs to apply 5N force to put it completely inside water.

(Note: The density of air is negligible compared t density of water. So you should ignore the mass of air.)