A 200 g ball rolls on a horizontal table at a constant speed of 10 cm / m. What is its kinetic energy?
| March 25, 2021 | education
m = 200 g = 0.2 kg.
V = 10 cm / s = 0.1 m / s.
Ek -?
The kinetic energy of the ball Ek is a scalar physical quantity, the value of which is determined by the formula: Ek = m * V ^ 2/2, where m is the mass of the ball, V is the speed of its movement.
Ek = 0.2 kg * (0.1 m / s) ^ 2/2 = 0.001 J.
The kinetic energy Ek shows what kind of mechanical work it can perform.
Answer: the ball has kinetic energy Ek = 0.001 J.
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