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abrowaqas
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Homework Statement
A man of mass 65kg is running at speed of 4.9m/s, jumps into a rowboat of 88kg that is drifting without friction in the same direction at a speed of 1.2m/s. when the man is seated in the rowboat, what is the final velocity of the boat?
Homework Equations
Momentum before = momentum after
The Attempt at a Solution
If
m= mass of man = 65kg
v= velocity of man = 4.9m/s
m' = mass of rowboat = 88kg
v' = velocity of rowboat = 1.2m/s
V= required final velocity
let
M= mass of both rowboat and man = m+ m' = 153kg
now
law of conservation of momentum
momentum before = momentum after
i-e
mv = M(v'+V)
so
V= (mv-Mv')/M
= 0.88 m/s
is it right method ?
but how could the speed of rowboat is such less?