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 45 kg hockey player standing at the center of a frictionless ice rink.  He hits a 30 g puck with great force, so that it moves with a speed of 150 m/s to the edge of the rink.  What happens to the hockey player?  

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.   Jack did an break shot and the balls rolled all over the pool table in velocity v.  Below is a snap shot of five identical balls in action.  Which ball has the largest 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 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 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 0 Net force Fnet 0 F2 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.   For the above question, list numbers and associate with proper symbol.  Please include unit next to the number. symbol number m    

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 car rounds a circle in clockwise direction while maintaining a constant speed. Which arrow represents the direction of the net force on the car as it rounds the curve at the instant shown below?

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

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

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:

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