A 80 -kg fisherman in a 120 -kg boat throws a package of mass m = 15 kg horizont

Question

A 80-kg fisherman in a 120-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.2 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat after the package is thrown.

magnitude
direction ---Select---toward the righttoward the left A 80-kg fisherman in a 120-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.2 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat after the package is thrown.

Explanation / Answer

momentum of combined weight of boat n fisherman equals momentum of the package thrown. now momentum is mass*velocity.

m1v1=m2v2
m1=80+120=200kg
v1?
m2=15kg
v2=4.2

so
200*v1=63
so v1=63/200=0.315

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