Vertical MotionMediumQuestion 5223
Question
A stone dropped from the top of a building takes 4 seconds to reach the ground (g = 10 m/s²). The height of the building is:
- A40 m
- B80 mCorrect
- C160 m
- D20 m
Correct answer
80 m
Explanation
h = ut + ½gt² = 0 + ½(10)(16) = 80 m.