Rankers Physics
Topic: Kinematics
Subtopic: Projectile from Height

A ball is thrown horizontally from the top of a 80 m tall building with a speed of 20 m/s. Find the time it takes to reach the ground

4 sec
5 sec
6 sec
7 sec

Solution:

Using formula for Time:

t=2H gt = \sqrt{\frac{2h}{g}} t=2×8010=16=4 st = \sqrt{\frac{2 \times 80}{10}} = \sqrt{16} = 4 \text{ s}

Correct Answer: (1) 4 s

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