“That’s all I got” is an effective way to end a speech.

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.   Jenny brought some balloons for her mom’s birthday party.  She tied the balloons at the back of her convertible.  She waved good bye to her boy friend and started the engine.  As she drove forward,

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 chinchilla is running with a velocity v.  A lab rat with half the mass is also running with v.  Compare the kinetic 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 to any website.   Calculate the average speed (in m/s) of an antelope that runs   m in   seconds

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 kg grand piano was hoisted up onto a 10th floor room in a building.    When the string is 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 to any website.   A baseball player catches the ball with the glove.  If we way that the action force is “the impact of the ball against the glove”.  The reaction force is

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.   Little John (in Robinhood) shoots an arrow upward.  As the arrow flies upward, which direction will Little John 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 traveling on a track as shown below. Disregard rotational motion and air resistance.  When the cart is at point E ,

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 few objects rolling down a wedge with a height H, as shown below.  The all have the radius R and the same mass M, except indicated by small (< R, < M) or large (> R, > M).  Select the last one that will arrive at the bottom.

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.   Where is the center of Mass of the following item?  The black dot represents the location of the center of mass.