A stone is released from the top of a tower of height 19.6 m calculate it's final velocity just before touching the ground.

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Chapter 9

NCERT

Class 9

Science

Solutions

14. A stone is released from the top of a tower of height 19.6 m calculate it's final velocity just before touching the ground.

Question:

A stone is released from the top of a tower of height 19.6m. Calculate its final velocity just before touching the ground.

Answer:

According to question, u = 0, h = 19.6 m, g = 9.8 m/s²

from the equation, v² - u²=2gh

v² - 0=2x9.8x19.6

v²=19.6 ms^-1

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