Unit 4 – Linear Momentum

/ Unit 4 – Linear Momentum

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You’ll explore the relationship between force, time, and momentum and learn to use the law of conservation of momentum to analyze physical situations.

Question Difficulty:

Question	Difficulty	Students Solved
Conservation of Momentum Principle	medium	25
Definition of Linear Momentum	medium	23
Condition for a Stationary Center of Mass	easy	17
Impulse and Newton's Third Law	medium	20
Impulse From Net Force	medium	17
Elastic Collision Final Velocity	medium	6
Vector Nature of Momentum	easy	11
Impulse and Change in Momentum	medium	7
Vector Addition of Momenta	easy	8
Conservation of Momentum with Astronauts	easy	6
Conservation of Momentum in an Explosion	medium	4
Horizontal Momentum of a Projectile	easy	4
Net External Force and Momentum Change	easy	5
Conservation of Linear Momentum	easy	8
Conservation of Linear Momentum Principle	easy	6
Average Force in a Collision	medium	8
Impulse and Final Velocity	easy	3
Identifying Elastic Collisions	easy	3
Collision Classification by Kinetic Energy	easy	7
System Boundaries and Momentum Conservation	medium	6

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Unit Leaderboard

Rank	User	Correct Count	Attempt Count	Time	Score
#1	dxie26808	215	272	0m 00s	20,930
#2	nmtnice2010	43	55	0m 00s	4,180
#3	jchenlisg	32	44	0m 00s	3,080
#4	Anny.Chen27	20	36	0m 00s	1,840
#5	siyeonkim4837	13	15	0m 00s	1,280
#6	shakthi.durai11	13	16	0m 00s	1,270
#7	miller.chen2011	11	20	0m 00s	1,010
#8	rdoan	9	12	0m 00s	870
#9	dazzled0253	8	10	0m 00s	780
#10	AmponsahG0112	8	16	0m 08s	712

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