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Using the principle of conservation of momentum, which equation is valid when the initial velocity of the second object is zero?

1. m1u1 + m2u2 = (m1 + m2)v
2. m1u1 = (m1 + m2)v
3. The initial velocity of the second object is zero
4. Applying the conservation of momentum principle

Correct answer: m1u1 = (m1 + m2)v

Solution

The equation m1u1 = (m1 + m2)v is derived from the law of conservation of momentum when the initial velocity of the second object (u2) is zero.

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