Question

Wen Peng ask me this question today on the Rapid KL bus. If u guys know the answer pls tell me in class.

Imagine u are in a bus, and the bus is moving at constant speed.
What will you see if :

1. You flip a coin while the bus is moving?
2. You flip a coin, and while the coin is in mid air, the bus stops suddenly?
3. You flip a coin, and while the coin is in mid air, the bus accelerates forward?

The options are:

(A.) The coin will move backwards.

(B.) The coin will move down in a straight line.

Imagine u are outside of a transparent bus, but u can see everything in the bus clearly.

What will u see if:

1. A person in a bus flip a coin in the bus?
2. A person flip a coin and while the coin is in mid air, the bus stops suddenly?
3. A person flip a coin and while the coin is in mid air, the bus accelerates forward?

There are only 2 options :

(A.) u will see the coin moving in a parabolic curve.

(B.) u will see the coin going up and down in a straight line.

Either leave your answer and reasoning in the comment box or tell me when u see me. Enjoy.