Before colliding the momentum of block a is +15.0 kg*m/s, and block b is -35.0 kg*m/s. after, block a has a momentum -12.0 kg*m/s. what is the momentum of block b afterwards? (unit=kg*m/s) remember: right is +, left is - me

-8 Kgm/s

Explanation:

From conservation of linear momentum, the sum of momentum before collision is equal to the sum of linear momentum after collision

The sum of momentum before collision is 15+-35=-20 Kgm/s

Momentum after collision is

x+-12=-20

x=-20+12=-8 Kgm/s

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))