you are on the roof of a building, 46.0 m above the ground. your friend, who is 1.80 m tall, is standing next to the building. what speed would an egg dropped from rest be traveling when it hit your friend on the top of his head?

29.448

Explanation:

first determine the distance from the top of the roof to the friends head.

Since he is 1.80 min height ,

distance =  46.0-1.80

              = 44.2 m

egg is dropped from rest means that its starting velocity is zero. It has to travel 44.2 m subjected to the gravitational acceleration

Applying  Motion equation

where v= end velocity (speed)

           u=Starting velocity

           a= acceleration

           s= Distance

(Let gravitational acceleration assumed as

The speed of egg is 14.73 m/s

Explanation:

Given the height of building (H) = 46 m

The height of friend (h) = 1.8 m

Distance for the egg to travel (s) = H – h = 46 – 1.8 = 44.2 m

Applying second equation of motion,

u = 0 (as the egg is starting from the rest)

g = 9.81 (as the object is falling)

Substituting the values,

44.2=0+

= 9

t = 3 sec

Calculating speed,

Speed =  

Speed =

Therefore, the speed of egg is 14.73 m/s

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

a.   mass number from atomic number