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This is an original exam question by Prof Kay Han. It is forbidden to photograph, upload, download, copy, or share this problem with anyone, or to post it to any website.   A [x] kg grand piano was hoisted up onto a 10th floor room in a building.    When the string is [y] m, the string got stuck and the piano started dangling.  The gravity of earth is 9.8 m/s2.  Calculate the period of the dangling piano.  

This is an original exam question by Prof Kay Han.  It is forbidden to photograph, upload, download, copy or share this problem with anyone, or to post it onto any website.   A [x]-kg cart is moving forward at [y] m/s on a frictionless surface. Then you apply a [a]-N forward force on it for [b] seconds in the same direction. Use impulse-momentum considerations to calculate the final speed of the car.

This is an original exam question by Prof Kay Han.  It is forbidden to photograph, upload, download, copy or share this problem with anyone, or to post it onto any website.   A deer is stranded on a frozen pound.  Suddenly, it coughs up a piece of twig it swallowed earlier.  The piece of twig flies forward at 2 m/s.  In which direction will the deer move.

This is an original exam question by Prof Kay Han.  It is forbidden to photograph, upload, download, copy or share this problem with anyone, or to post it onto any website.   A roller coaster drops from a high point of the track.  On the way down, the mechanical energy

This is an original exam question by Prof Kay Han.  It is forbidden to photograph, upload, download, copy or share this problem with anyone, or to post it onto any website.   Sitting on a circling Ferris wheel.  The work done by the centripetal force on you is

You have two beakers of water.  Beaker A has a salinity of 20 ppt, and beaker B has a salinity of 30 ppt.  If you combined the two beakers being careful to not mix the water, the water from Beaker A would be:

What is the density?

If 3 is the mid-ocean ridge, what would you call feature #4?

Your radiograph has thin diverging black lines on it. What is the most likely cause of this?

The term “gravel” refers to the sediment’s: