Fill in the blanks using "at rest" or "in motion".
A person walking in a compartment of a stationary train is ________ relative to the compartment and is ________ relative to the platform.

Q. Fill in the blanks using "at rest" or "in motion".
A person sitting in a compartment of a moving train is ______ relative to the other person sitting by his side and is ______ relative to the platform.

Q. A ball is thrown vertically upwards (relative to the train) in a compartment of a moving train. The face of the person sitting inside the compartment is towards engine of the train.

Q. A ball is thrown vertically upward (relative to the train) in a compartment of a moving train (train is moving horizontally). Then, choose the correct option(s):

Q. At an airport, a bored child starts to walk backwards on a moving platform. The child accelerates relative to the platform with $a=-0.5m/s^2$ relative to the platform. The platform moves with a constant speed $v=+1.0m/s$ relative to the stationary floor. In $4.0$ seconds, how much will the child have been displaced relative to the floor?

Q. A train is standing on a platform, a man inside a compartment of a train drops a stone. At the same instant train starts to move with constant acceleration. The path of the particle as seen by the person who drops the stone is: