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Impulse for Two Objects being Attracted to One Another

In a universe devoid of anything else, two identical spheres of mass, m, and radius, R, are released from rest when they have a distance between their centers of mass of X. Find the magnitude of the impulse delivered to each sphere until just before they make contact. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:
0:07 Translating the problem
1:26 Applicable impulse equations
2:13 Conservation of mechanical energy
3:28 Showing a common mistake
4:00 Solving the problem

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Thank you to Youssef Nasr for transcribing the English subtitles of this video.

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