1) Running forwards at 4m/s on a train
travelling at 40m/s.
backwards at 2m/s on a train travelling at 40m/s.
3) Throwing a ball sideways at 10m/s
from a car travelling at 30m/s.
Throwing a ball upwards at 10m/s on a train
travelling at 20m/s.
5) Throwing a
ball at 15m/s towards a train travelling at 50m/s.
(Think about what speed you would see the
ball move away from you, and what speed the train
driver would see the ball come towards him!)
Extension: If the bouncy
ball in question 5 had a coefficient of restitution of 0.8, what speed the
ball will bounce off of the train, from each persons