Answer:
workdone by the person in J is 445.92J
Explanation:
workdone= force x total distance
force= mass x acceleration due to gravity(g)\
mass=4.5kg
g=9.81m/s
force= 4.5 x 9.81 =44.15N
total distance=1.4+8.7=10.1m
workdone=44.15 x 10.1
=445.92J
This is known as social infrastructure. These are called social because they are used by all people in a country and are often paid for by the country or the state owns the land on which they are built. When they are private, they often work together with the government.
Yes most egyptian pyramids have the pharaohs tomb in them
