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Homework Statement
A track consist of a frictionless arc XY, which is a quarter-circle of radius R, and a rough horizontal section YZ. Block A of mass M is releasecd from rest at point X, slides down the curved section of the track, and collides instantaneously and ineslastically with identical block B at point Y. The two blocks move together to the right. Express the answers in term of M, R, and g.
It asked to determind the speed of the combined blocks immediately after the collision.
Homework Equations
The Attempt at a Solution
Help me out please. This is the question from the AP test Physic B. I've tried to use the conservation of momentum after collision. But the initial velocity is 0, so how can i find the velocity after collision?Thank you