2. Conservation of Linear MomentumSee Figure 2. Block 1 of mass m₁ slides from rest along a frictionless ramp from an unknownheighth and then collides with stationary block 2, which has mass m₂ = 3m₁ . The collision is anelastic one. After the collision, block 2 slides into a friction-filled region where the coefficient ofkinetic friction is 0.5 and comes to a stop through a distance d = 10 m in that region.(a) What is the height h? (ANSWER: h = 20 m)(b) What is the velocity of block 1 just after the collision? (ANSWER: (-)10 m/s)(If the collision were instead, completely inelastic (that is, the objects stick together, what is theheight h?)

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