Question

A stone dropped from the top of a building falls through 44.1 m in the last second of its motion. Find the time taken to reach the ground and the height of the building ? Take g = 9.8 m s-2.​

Answer 1

Step-by-step explanation:

44.1=H-(distance travled in (

g

2H

−1s)

Time of flight =

g

2H

Distance traveled in

( g2H )−1= 21

g

( g2 −1)

2

= 2g

( g2H +1−2 g2H )

=H+

2

g − 2gH

44.1=

2gH − 2g

= 2gH −4.9

2gH

=49

2×9.8×H=49×49

H=

9.8×2

49×49×10

H= 4490

=122.5m

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Answer 2

Answer:

432.18

Step-by-step explanation:

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