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Reptile [31]
3 years ago
6

a ball is projected horizontally from the top of a hill with a velocity of 30 m per second if it reaches the ground 5 seconds la

ter the height of the hill is​
Physics
2 answers:
alina1380 [7]3 years ago
7 0
The height of the hill is 125m.
Reptile [31]3 years ago
7 0

Answer:

The height of the hill is 125m.

Explanation:

Since the ball is projected horizontally from the top of a hill, there is no vertical component of the velocity of projection. Therefore, so far as motion in the vertical direction is concerned, the ball is just dropped, ie its initial velocity u is merely 0 m/s. It reaches the ground after 5 seconds from the moment of projection, under the action of accerelation due to gravity.

Using,

s = u t + ½ a t². In this expression u= 0 m/s, a = 10m/s², t = 5 s. Substituting in the equation we get,

s = 0× t + ½ ×10 m/s²× 5²s²= 5× 25 m = 125m.

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