Answer : Option DExplaination / Solution:
First synchronous census in India was held in 1881. Since then, censuses have been undertaken uninterruptedly once every ten year.
Q10.An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity.
Answer : Option BExplaination / Solution:
Radius of the loop, r = 1 km = 1000 m
Speed of the aircraft, v = 900 km/h
= 900×518=250m/s
Centripetal acceleration, ac=v2r
= (250)21000=625001000=62.5m/s2
Acceleration due to gravity, g = 9.8 m/s2
acg=62.59.8= 6.4 g
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0