- #1

wakejosh

- 102

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1. In a system with two moving objects, when a collision occurs

between the two objects,

what is conserved?

a. the total kinetic energy is always conserved

b. the total momentum is always conserved

c. the total kinetic energy and total momentum are always conserved

d. neither the kinetic energy nor the momentum is conserved

e. the total momentum is never conserved

-from what I understand B is the right answer, and If the collision was elastic C would be true, but in this case I think B is the right answer because I know in an isolated collision momentum is always conserved.

with this next question I am having trouble finding the equation I need if anyone can point me in the right direction.

2. A 50 kg swimmer dives horizontally off a 75 kg rowboat. If the

speed of the rowboat

immediately after the swimmer dives off is 1.0 m/s, what speed did

the diver leave the

rowboat?