Question

a stone is dropped from a window and reach the ground in 0.5 seconds​

Answer 1

Answer:

Explanation:

Initial speed (u) = 0  (as the stone is at rest)

Time = 0.5 seconds

Acceleration = 9.8m/s²  

i) According to first equation of motion :v = u + at

v = 0 + 9.8 x 0.5v = 4.9 m/s

This is the speed just before stone hits the ground

ii) According to third equation of motion :v² = u² + 2as

(4.9)² = 0 + 2 x 9.8 x s24.01 = 19.6ss = 1.225

so the average speed = 1.225/0.5 = 2.45m/s

iii) Height of window from the ground

Height = 1.225m

hope it help will u

Answer 2

Answer:

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