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A ball is thrown vertically upwards at a speed of 10 m/s. What is its velocity after 2 seconds?
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A
-20 m/s
💡 Explanation:
Using the equation of motion, v = u + at, where u is the initial velocity, a is the acceleration due to gravity (-9.8 m/s^2), and t is the time, we can calculate the velocity after 2 seconds: v = 10 m/s + (-9.8 m/s^2) * 2 s = -20 m/s.