volume_mute

An object falling from a very high platform achieves a speed of ______ by end of third second

publish date: 2022/05/26 08:15:00 GMT+10

volume_mute
31 m/s
26 m/s
28 m/s
29.4 m/s

Correct Answer

29.4 m/s

Explanation

Gravity acceleration is 9.8 m/s2

So, the speed of the object by end of third second = 3 * 9.8 = 29.4 m/s

Reference

Basic Physics: A Self-Teaching Guide

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