# A truck weighing 3 tons was driving at a speed of 72 km / h. After loading, its weight increased by 1 ton.

December 29, 2020 | education

| **A truck weighing 3 tons was driving at a speed of 72 km / h. After loading, its weight increased by 1 ton. How many times will the momentum of a truck change if it rises at a speed of 60 km / h.**

Recall the formula for finding the momentum of the body

p = m * V

Let’s convert all units to the SI system:

m1 = 3000kg

m2 = 1000kg

V1 = 72km / h = 20m / s

V2 = 60km / h = 16.7m / s

Consider the first case

p1 = 3000kg * 20 = 60,000

p2 = (m1 + m2) * V2 = 4000 * 16.7 = 66800

p2 / p1 = 66800/60000 = 1.11

Answer: momentum increased by 1.11 times

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