The kinetic energy of the body is 8 J, and the magnitude of its impulse is 4 kg * m / s. Body weight is equal.
| March 19, 2021 | education
Initial data: Ek (kinetic energy of the body) = 8 J; P (body impulse value) = 4 kg * m / s.
Let’s determine the speed of the body from the impulse formula: P = m * V, whence V = P / m = 4 / m.
We find out the body mass by substituting the obtained value into the kinetic energy formula: Ek = 0.5 * m * V ^ 2/2 = 0.5 * m * (4 / m) ^ 2 = 8 / m, whence m = 8 / Ek = 8/8 = 1 kg.
Answer: Body weight is 1 kilogram.
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