Please help me a Physics problem?

A boy of mass 30kg jumps with a velocity of 2.0 m/s into a stationary wagon of mass 40 kg. What is the final velocity?

Comments

  • Use conservation of momentum to solve this problem.

    m1 * u1 + m2 * u2 = (m1+m2) * V

    m1 = 30 kg = mass of the boy

    u1 = 2.0 m/s = velocity of the boy before

    m2 = 40 Kg = mass of the wagon

    u 2 = 0 m/s = velocity of wagon before.

    V = 30*2 / (30 + 40)

    V = 0.86 m/s <=== This's the final velocity.

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