Question

a student states that there will be 10 J of energy in the kinetic store just before it hits the ground. explain why the student has made that statement

Answer 1

Answer:

Problem:

• Concepts: Momentum conservation.
• Reasoning: In an inelastic collision kinetic energy is not conserved, but momentum is conserved.
• Details of the calculation: m1u1 = (m1 + m2)v. Ef = ½ (m1 + m2)v2, Ei = ½ m1u12. Fraction of energy lost = (Ei - Ef)/Ei = 1 - m1/(m1 + m2) = m2/(m1 + m2).