NEET2020Physics-Kinematics
NEET 2020 Physics Vertical Motion MCQ Question
Type: MCQ-numerical-Easy-Class 11
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is: (g = 10 m/s²)
A
320 m
B
300 m
C
360 m
D
340 m
Correct Answer
Option B
Detailed Explanation
Using v² = u² + 2gh: (80)² = (20)² + 2(10)h → 6400 = 400 + 20h → h = 6000/20 = 300 m. The correct answer is B (300 m). The original explanation correctly computed 300 m but then incorrectly overrode this to claim 360 m for option C.
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