Posted by Kayla V on Wednesday, October 28, 2009 at 11:47pm.
Batman (mass = 95 kg) jumps straight down from a bridge into a boat (mass = 560 kg) in which a criminal is fleeing. The velocity of the boat is initially +10 m/s. What is the velocity of the boat after Batman lands in it?

Physics  MathMate, Thursday, October 29, 2009 at 9:07am
Assuming the criminal's weight is included in that of the boat (560 kg), calculate the initial kinetic energy using
KE0 = (1/2)Mv0²
Calculate the new kinetic energy
KE1 = (1/2)(M+m)v²
Equate KE0 and KE1 and solve for v.

Physics  Mindy, Tuesday, July 7, 2015 at 4:37pm
Or save yourself the trouble and use the following formula.
I just did this problem.
(m1*v01)/(m1+m2)

Physics  will, Monday, November 23, 2015 at 10:19pm
don't try this ^^ there wrong

Physics  mindy L., Wednesday, March 23, 2016 at 7:56pm
mindy's is right
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