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💥 Collisions: Elastic & Inelastic 1D

Momentum Conservation NEET · JEE · KCET p_initial = p_final
→ Positive velocity (right)   |   ← Negative velocity (left)
Positive → moves RIGHT | Negative → moves LEFT
Positive → moves RIGHT | Negative → moves LEFT
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂ | e = (v₂ - v₁)/(u₁ - u₂) = 1
Initial p_total
0.00
kg·m/s
Final p_total
0.00
kg·m/s
Initial KE
0.00
J
Final KE
0.00
J

📊 Momentum Conservation

m₁u₁ = 0.00
m₂u₂ = 0.00
p_initial = p_final ✅

🎯 Final Velocities

v₁ = 0.00 m/s
v₂ = 0.00 m/s

🔍 What to Observe

  • Momentum is ALWAYS conserved in all collisions
  • Elastic collision: KE is conserved (e = 1)
  • Inelastic collision: KE is NOT conserved
  • Perfectly inelastic: objects stick together (v₁ = v₂)
  • Equal masses in elastic: m₁ stops, m₂ moves with u₁
  • Opposite velocities → head-on collision
Ready
Before collision
💡 Total momentum is ALWAYS conserved. For elastic collisions, total KE is also conserved. For perfectly inelastic, objects stick together.
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