A stone is projected vertically upward with a
speed 30 m/s from the top of a tower. If it strikes
the ground with a speed of 10 √3 m/s, then height
of tower is (g = 10 m/s)
(1) 10 m
(2) 15 m
(3) 30 m
(4) 20 m
Answers
Answered by
8
Answer:
30m
Explanation:
When the body is projected from the building it will go with v=30m/s. So naturally it will reach the same height with the same speed. (V=U) ...... Now it will travel all the way down the tower and we have to calculate the height of the tower..... Here you go
V² = u² + 2aS
V² = u² - 2gh
2gh= (30) ² - (10√3)²
....
Like that you get h=30m
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