# Physics

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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 -

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 -

Or save yourself the trouble and use the following formula.

I just did this problem.

(m1*v01)/(m1+m2)

• Physics -

don't try this ^^ there wrong

• Physics -

mindy's is right

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