Mechanical Energy (ME)_2.1

A ball of mass m = 1.8 kg was dropped from the top of a 200 m tall building.
Calculate the ball’s average speed savg for the first three (3) seconds.
How much time does it take to cover the second (2nd ) half ( 100 m → 200 m) of the flight?
What is the ball’s gravitational potential energy PEg after four (4) seconds.
How fast is the ball moving when it is 40 m above the ground?
What is the kinetic energy KE and potential energy PE at t = 5.5 s?

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