Name: _____________Lucinda Perez
Relative Motion and Twin Paradox
Remember to show math work for credit.
Bob is on a train that is traveling at 100 miles/hr.
Tim stands on the ground.
Bob throws a ball at 5 miles/hr in the same direction as the
What is the speed of the ball according to Tim?
Now Bob throws the ball at 5 miles/hr in the opposite direction.
What does Tim see
the speed of the ball to be?
Tim stands on another train that is moving in the same direction as Bob at 90 miles/hr.
How fast is Bob moving according to Tim?