A body with a mass of 2 kg moved at a speed of 5 m / s and collided absolutely inelastically
| February 24, 2021 | education
A body with a mass of 2 kg moved at a speed of 5 m / s and collided absolutely inelastically with the same stationary body. The new speed of the bodies will be equal to
To find the new velocity of the colliding bodies, we will use the equality (the law of conservation of momentum; the impact is absolutely inelastic, the masses of the bodies are equal): m1 * V1 = (m1 + m2) * V = 2m1 * V, whence we express: V = m1 * V1 / 2m1 = V1 / 2.
Variables: V1 – speed of the first body before impact (V1 = 5 m / s).
Calculation: V1 = V1 / 2 = 5/2 = 2.5 m / s.
Answer: The new speed of the colliding bodies is 2.5 m / s.
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