1. A child wishes to determine the speed a slingshot imparts to a rock. How can this be done using..

1. A child wishes to determine the speed a
slingshot imparts to a rock. How can this be done using only a meter stick, a
rock, and the slingshot?

2. In archery, should the arrow be aimed
directly at the target? How should your angle of aim depend on the distance to
the target?

3. If you are riding on a train that speeds
past another train moving in the same direction on an adjacent track, it
appears that the other train is moving backward. Why?