# PHYSICS

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The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the deck to the street below.

• PHYSICS -

Assuming free-fall without air-resistance, then use
S=ut+(1/2)gt²
where S=370m, u=initial velocity=0
Solve for t:
370=(1/2)(9.81)t²
It should come out to about 8.5 or 8.6 seconds

• PHYSICS -

7.55

• PHYSICS -

The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the deck to the street below.

• PHYSICS -

v0…5-u0…5=2as
(0)0…5-(u)0…5=2(-9.8)(370)
u=85.15

v=u at
o=85.15 (-9.8)(t)
-85.15=(-9.8)t
8.6s= t

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