A ball weighing 0.2 kg moves at a speed of 9 m / s, collides with a stationary ball whose
| August 4, 2021 | education
A ball weighing 0.2 kg moves at a speed of 9 m / s, collides with a stationary ball whose mass is 0.1 kg. What is the speed of the balls after an inelastic collision?
Initial data: m1 (mass of a moving ball) = 0.2 kg; m2 (mass of a stationary ball) = 0.1 kg; V1 (speed of a moving ball before inelastic collision) = 9 m / s.
After inelastic collision, the balls will move together in the direction of the first ball. We calculate the speed of the balls from the equality:
m1 * V1 = (m1 + m2) * V1,2.
V1.2 = m1 * V / (m1 + m2) = 0.2 * 9 / (0.2 + 0.1) = 6 m / s.
Answer: After inelastic collision, the speed of the balls will be 6 m / s.
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