physics
posted by willy n .
a 20.0 kg child on an 80 kg boat throws a 5 kg package horizontally with a speed of 10 m/s. Calculate the resulting density of the boat, assuming it was initially set at rest.

Density? What was the original volume? Assuming the density of the boat to be originally about .50, then
volume= 105kg/.5=210liters
Then new density is 100kg/210liters=.476