Physics Problem: Man jumps off boat.?

Tillie Wynott: The boat will move in the opposite direction, but you need the boat's mass to find the speed.

Dick Maisenbacher: Hi, Jamie. Since there are no external forces applied, the CM of the boat/man system does not move, even after he jumps off. If the boat's velocity is v,180lb * (10ft/s - v) = 1000lb * v1800 - 180v = 1000v1800 = 1180vv = 1.53 ft/s ← boat's speed relative to wateru = 10fts - v = 8.47 ft/s ← man's speed relative to water (bonus!)Obviously the boat moves in the direction opposite to the man's dive.Check: the system momentum should still be zero:p = 180lb * 8.47ft/s - 1000lb * 1.53ft/s = 0 √...Show more

Serita Hefferon: Sorry the boat is 1000lbs.