Wonderful to watch


See also the previous blog post, for reading if you have time.

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HW related to pendulum lab

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Review the notes on the blog (2 posts ago) and try these questions and problems (similar to what we did in class today, Monday 4/2). 1.  Give an example of 2 different conservation laws. 2.  What is the mathematical definition of momentum? 3.  What is the conservation of momentum, and when do we think about it (under what specific circumstances)? 4.  A 300-g cart moving at 40 cm/s hits another 300-g at rest.  Friction is very low.  What do you expect will happen exactly?  Give numbers if possible. 5.  A 60-kg figure skater skating at 8 m/s collides directly with a 40-kg skater initially at rest.  Friction is very low and the two become intertwined on the ice.  Calculate the speed of the two of them together after the collision.  (Hint:  First find the momentum of the 60-kg skater, and then use conservation of momentum to solve for the final speed of the two together.  This is like the velcro cart collisions.) 6...
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Pendulum homework for Monday

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