The change in the momentum of a body with a change in its speed can be calculated by the formula:
ΔР = mV – mV0 = m * (V0 – V), where m is the given body mass (m = 50 kg), V is the final velocity of the given body (V = 5 m / s), V0 is the initial velocity of the body (V = 36 km / h = 36 * 1000/3600 = 10 m / s).
Let’s do the calculation:
ΔР = 50 * (5 – 10) = 50 * (-5) = -250 kg * m / s.
Answer: The momentum of this body has decreased by 250 kg * m / s.
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