9th Class
Science
Gravitation and Floatation
Question Bank
Gravitation and Pressure
question_answer
A rectangular tank of \[6\,\,m\] long, \[2\,\,m\] broad and \[2\,\,m\] deep is full of water, what is the thrust acting on the bottom of the tank?
A)\[23.52\times {{10}^{4}}N\]
B)\[23.52N\]
C)\[11.76\times {{10}^{4}}N\]
D)\[3.92\times {{10}^{4}}N\]
Correct Answer:
A
Solution :
Thrust \[=\]Total weight acting normally = mg But mass \[=\] volume \[\times \] density \[\therefore \]Thrust = volume of tank \[\times \] density of water \[\times \,\,g\] \[=(6\times 2\times 2)\times ({{10}^{3}})\times (9.8)\] \[=23.52\times {{10}^{4}}N\]