This MCQ can be solved by the method of elimination.

How do you solve it from first principles?

This MCQ can be solved by the method of elimination.

How do you solve it from first principles?

This question caused quite an avid discussion amongst Physics Educators recently. So I dug out the TYS and found the question and model answer.

Using the video motion analysis, the velocity-time graph below is obtained:

I simulated the same event using a ball and a cylinder half filled with water and took the following video:

Labels:
kinematics,
mechanics,
terminal velocity,
velocity

In most textbooks, Reflection and Refraction are taught as independent topics. However, in this question, it is implied to students that both processes can happen at the same time.

Here is an experiment that I have done using a laser pointer:

More information can be found here:

http://www.ece.rice.edu/~daniel/262/pdf/lecture13.pdf

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