Ahammer is dropped and it falls for 9 seconds 9 seconds before hitting the ground. determine how far it falls, assuming an acceleration due to gravity of − 9.8 m/s 2 −9.8 m/s2 and no wind resistance.

396.9 meter

Step-by-step explanation:

If a represents the acceleration,

Then according to the question,

a = -9.8 m/s²,

    ( acceleration = change in velocity with respect to time ),

Integrating both sides,

When t = 0 seconds, v = 0 m/s,

( velocity = change in position with respect to time ),

Integrating again,

When t = 0 , x = 0 meters,

Hence, the final equation that shows the position of the hammer after t seconds,

If t = 9 seconds,

 ( negative sign shows the fall ),

Therefore, it will fall 396.9 meter in 9 seconds

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.