Starting from rest, two boats in the middle of the sea push off against each other. The force of push is an force. After separating, the two boats move in opposite directions. Boat 1 of mass 120 kg moves at 1.5m/s to the right whereas Boat 2 of mass 240 kg moves to the left with a final velocity v, , equal to We assume friction is negligible, the system is isolated and the positive direction is to the right.

Starting from rest, two boats in the middle of the sea push off against each other. The force of push is an force. After separating, the two boats move in opposite directions. Boat 1 of mass 120 kg moves at 1.5m/s to the right whereas Boat 2 of mass 240 kg moves to the left with a final velocity v, , equal to We assume friction is negligible, the system is isolated and the positive direction is to the right.