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How can we calculate the velocity of a freely falling ball five seconds after it has reached a velocity of 19.6 m/s? The velocity of the freely falling ball five seconds after it has reached 19.6 m/s can be calculated using the equation for uniform acceleration caused by gravity. In this case, we can apply the formula v = u + at where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Given that the initial velocity u after two seconds is 19.6 m/s and the acceleration due to gravity is 9.8 m/s², we can calculate the final velocity after five more seconds as follows:

First, we know that the initial velocity u is 19.6 m/s, the acceleration a is 9.8 m/s², and the time t is 5 seconds. Plugging these values into the equation v = u + at:

v = 19.6 m/s + (9.8 m/s² × 5 s)

v = 19.6 m/s + 49 m/s

v = 68.6 m/s

Therefore, the velocity of the freely falling ball five seconds after it has reached 19.6 m/s is 68.6 m/s. With these calculations, you can see how physics concepts and formulas can be applied to solve real-world problems. Keep practicing and challenging yourself with more physics problems to accelerate your learning!

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