An object of mass 4 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. What is the kinetic energy of the object as it reaches its maximum height?
A) 800 J
B) 400 J
C) 200 J
D) 0 J
E) 80 J
Correct Answer:
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