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As per your syllabus, eqn 5.22, in a COMPLETELY inelastic 1D collision (mass m₁ at v₁ hits m₂ at rest), the common final velocity is which?
Am₂ v₁ / (m₁ + m₂)
B2 m₁ v₁ / m₂
Cv₁ (unchanged)
Dm₁ v₁ / (m₁ + m₂)
Answer & Solution
Correct answer: D. m₁ v₁ / (m₁ + m₂)
syllabus eqn 5.22: m₁ v₁ = (m₁ + m₂) v_f ⇒ v_f = m₁ v₁ / (m₁ + m₂). Bodies stick together.
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