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.   Two cars moving toward each other and collided.  After the collision, the two cars coupled and move together.  The momentum of the two car system 

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.

Organization will help make your speech easy to understand and remember. 

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.   In the following ticker tape experiment, which one(s) is(are) constant speed?

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.   Jack and John pull on a box with a mass M = 54 kg, causing the box move to the left with a constant speed. Acceleration: a [a] 0 Net force Fnet [f] 0 F2 [comp] F1

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 B climing up,

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 girl holding a ball is on a skateboard at rest.  A moment later, she threw the ball over to her friend.  Ignore friction,  

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 child starting from rest slides down each of the four slides A to D. Each has the same vertical height.  Consider friction and air resistance, Which one has the highest velocity when the child reaches to 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.   You are sitting on a Merry-go-round.  Which location you sit will provide you with the greatest angular speed?  

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.   Select the reason why the barrel is at the exit of a highway.