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A barometer kept in an elevator accelerating upwaards reads 76 cm. the air pressure in the elevator is a)76 cm b) c)>76 cm d)0 give reason and explain

A barometer kept in an elevator accelerating upwaards reads 76 cm. the air pressure in the elevator is
a)76 cm
b)
c)>76 cm
d)0
give reason and explain 

Grade:11

1 Answers

Vikas TU
14149 Points
7 years ago
From m(g+a) the air pressure would be sure more than the 76 cm as under normal conditions the total pressure is less than the 76 cm but as it is given that while accelerating it is already 76 cm hence the atmospheric pressure should be greatre than the pressure when the lift accln. = 0 .

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