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HELP PLS! :/

A ball thrown straight up takes 1.89s to reach a height of 41.6m.
Taking g =9.81 m/s2 the balls initial speed was:

Help plsss

HELP PLS A Ball Thrown Straight Up Takes 189s To Reach A Height Of 416m Taking G 981 Ms2 The Balls Initial Speed Was Help Plsss class=

Sagot :

StudiousStud3nt

Answer:

31.28m/s

Explanation:

We can use the third key equation of accelerated motion

Δd = viΔt+1/2aΔt^2

subtitute in the values we know

41.6 = vi(1.89)+1/2(-9.8)(1.89)^2

41.6 = vi(1.89) - 17.52

59.12 = vi(1.89)

vi = 31.28

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