After the break, we came back to do a little peer teaching before taking the Energy Conservation Lab and Practical Test, which took us into lunch until noon.
After lunch, we came back to perform the collisions lab and to learn several new terms.
Energy lost: (energy before-energy after)/energy before x 100
Scalar: simply valuies; no direction involved
velocity: magnitude and direction
Anything moving right or up = positive
Anything moving left or down = negative
Elastic collision - bounce, conserves mechanical energy
Inelastic collision - thud, some ME is converted to internal energy
Momentum(P) - mass x velocity (kg x m/s)
During the lab, we noticed that elastic collisions were more efficient at conserving mechanical energy than inelastic collisions
Real world connection:
When scientists collide particles to try to recreate the Big Bang, they are using these very laws of energy conservation and collisions. They shoot particles with extremely high velocities at each other in hopes to create the conditions that caused the big bang. Rather than bounce, these collisions cause conditions for a fraction of a second, which can give clues to the origins of life on the planet.
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