What work must be done to stop a body with a mass of 2 kg, moving at a speed of 8 m / s?
| April 4, 2021 | education
Task data: m (body weight to be stopped) = 2 kg; V (body speed) = 8 m / s.
The work required to stop a given body can be determined by the formula (the kinetic energy of a given body must become zero): A = ΔEk = m * V1 ^ 2/2 – m * V2 ^ 2/2.
Let’s make a calculation: A = 2 * 8 ^ 2/2 – 2 * 0 ^ 2/2 = 64 J.
Answer: To stop the body, you need to do a work of 64 J.
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