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A coin is rolling down a horizontal roof with a velocity of 3.2 m/s. The time taken by the coin to hit the ground after falling off the roof is 1.2 s. What is the approximate distance of the roof from the ground ?


a) 2.5 m b) 3.5 m c) 5 m d) 7 m


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Answer 1

Here:

v = 3.2m\s

t = 1.2s

u = 0m\s

g = 9.8m\s²

Therefore:

s = ut + at²

s = 0*1.2 + 1/2*9.8*1.2*1.2

s = 7.056

s = 7m

D) 7m

Answer 2

HIII....

HERE IS YOUR ANSWER:--------

V=3.2m/s

T=1.2S

U= 0M/S

g=9.8 m/s

S=UT+AT^2

S= 0.12+1/2×9.8×1.2×1.2

=7.056.

HOPE THIS HELPS YOU.....