A 400 g ball rolls on a horizontal table at a speed of 0.2 m / s. What is its kinetic energy?
| July 3, 2021 | education
We calculate the kinetic energy of a given ball using the following formula:
Ek = m * V ^ 2/2, where, according to the condition of the problem, m (ball mass) = 400 g = 0.4 kg; V (speed of the ball on the horizontal table) = 0.2 m / s.
Let’s perform the calculation:
Ek = 0.4 * 0.2 ^ 2/2 = 0.008 J = 8 mJ.
Answer: The kinetic energy of this ball is 8 mJ.
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