Velma is in a train headed north past Mort at 30 m/s. Velma has a slingshot that can shoot pebbles at 40 m/s. Velma shoots a pebble toward the rear of the train. Mort observes the pebble's velocity to be

Question

Quizplus · Accepted Answer

The pebble's velocity relative to the train is 40 m/s south, and the train's velocity relative to Mort is 30 m/s north. Therefore, the pebble's velocity relative to Mort is 40 m/s south minus 30 m/s north, resulting in 10 m/s south.

Velma Is in a Train Headed North Past Mort at 30