Re: why water ballon making a bigger splash when drop at a higher point to a bucket of water ?

To understand why water balloons make a bigger splash when dropped from a 
higher height, you need to understand a little about energy.

Energy can be stored in many ways.  We buy gasoline for our cars because 
it contains chemical energy that can be converted to kinetic or mechanical 
energy to make our cars run.  Energy can also be stored as potential 
energy by raising an object to a higher location.  Many cities store their 
water in water towers. The water can flow downwards from the tower to the 
citizens, converting the potential energy of the water into water pressure 
that helps it flow through the pipes to your house.

When you raise your water balloon to a higher height, you are increasing 
its potential energy, which is the product of the amount of water and the 
height you raise it above its final resting point.  Theoretically, a 
balloon which is twice the size would have the same potential energy as a 
smaller one that was raised to twice the height.

When you let go of the balloon, the potential energy is converted to 
kinetic energy of the balloon's motion.  The faster the balloon goes, the 
more energy is converted to kinetic energy.  It's the same as if you took 
your bicycle to the top of a hill and coasted down.  The higher the hill, 
the faster you will go when you get to the bottom.

When the balloon strikes the ground, all of that energy must go somewhere, 
since we have learned that energy can't be created or destroyed, only 
changed in form from one to another.  The kinetic energy of the water is 
large.  Some gets converted back temporarily to potential energy as the 
water splashes back up in the air.  A slight amount gets converted to heat 
as the water warms slightly.  But most of it is preserved in kinetic 
energy that splashes the water in all directions until gravity overcomes 
it.

If you drop a water baloon into a bucket of water, the water in the bucket 
will also add to the splash.  Initially, the water in the bucket will be 
at rest.  When the water balloon hits it, some of its energy will transfer 
to the water in the bucket.  The water in the bucket must go somewhere 
also, so the water splashes out of the bucket.  Because the water can move 
slightly, compared to solid ground, the transfer of energy can take a 
little longer to occur in time.  That is likely why the splash may seem 
more spectacular compared to a water balloon hitting the ground.  But the 
biggest factor is how much energy you put into the balloon to begin with.  
So the bigger balloon raised to a higher initial height will create the 
biggest splash.