inelasticity - Northern California

Question

In collisions with the “perfect” form of this property, two objects stick together and the coefficient of restitution is zero. For 10 points each:

[10e] Name this property of all real-world collisions. In collisions with this property, energy is lost to the environment.

ANSWER: inelasticity [accept inelastic collisions; accept partial inelasticity or perfect inelasticity]

[10m] Perfectly elastic conditions maximize this quantity, denoted J, which equals the time integral of force.

ANSWER: impulse

[10h] This function is sometimes called the unit impulse since if force equals this function of time, impulse equals the Heaviside step function. The position of a point mass is represented by this function.

ANSWER: Dirac delta function [prompt on Dirac function]

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Summary


Northern California	Main	Y	4	22.50	50%	100%	75%
Southern California	Main	Y	7	20.00	86%	57%	57%
Eastern Canada (1)	Main	Y	5	14.00	60%	40%	40%
Florida	Main	Y	4	12.50	50%	75%	0%
Great Lakes	Main	Y	10	13.00	50%	60%	20%
Lower Mid-Atlantic	Main	Y	9	15.56	78%	56%	22%
Upper Mid-Atlantic	Main	Y	9	20.00	67%	89%	44%
North	Main	Y	4	12.50	50%	50%	25%
Northeast	Main	Y	12	15.83	67%	75%	17%
Pacific	Main	Y	8	8.75	38%	25%	25%
South Central	Main	Y	6	11.67	33%	50%	33%
Southeast	Main	Y	12	16.67	83%	42%	42%
UK (North)	UK	Y	5	16.00	80%	60%	20%
Upstate NY	Main	Y	5	18.00	60%	100%	20%

Data


Berkeley Boss Bandit	Berkeley Little Prince	10	10	10	30
Berkeley Mighty Miner	Berkeley Skeleton King	0	10	0	10
Stanford B	Stanford A	10	10	10	30
Berkeley Archer Queen	UCSC	0	10	10	20