a body is freely falling from a height 10m .its average velocity when it reaches earth is
Answers
Explanation:
the velocity of body will continuously changed because of the effect of gravitation force acting done words on the body but we can define the average velocity because it is defined for a comparatively large interval of time the average velocity will be the total distance travelled upon total time taken at the height of the body from which it is stop by H and hence applying
average velocity = 7 m/s when body reaches earth if freely falling from a height 10m
Explanation:
a body is freely falling
=> u = 0
Height = 10 m
=> S = 10
a = g = 9.8 m/s²
using V² - U² = 2aS
=> V² - 0 = 2(9.8)(10)
=> V² = 196
=> V = 14
Average Velocity = (u + V)/2
= (0 + 14)/2
= 7 m/s
average velocity when it reaches earth = 7 m/s
Another Method :
Using S = ut + (1/2)at²
=>10 = 0 + (1/2)(9.8)t²
=> t² = 100/49
=> t = 10/7
Average Velocity = Distance time = 10/(10/7) = 7 m/s
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