Question

Consider the situation of the previous problem. Let the water push the left wall by a force F1 and the right wall by a force F2.
(a) F1 = F2
(b) F1 > F2
(c) F1 < F2
(d) the information is insufficient to know the relation between F1 and F2

Answer 1

The force on left wall is greater than the force on the right wall. So the answer is $F 1>F 2.$

Explanation:

• In the above figure, F1 and F2 forces are pushed by water on left and right wall respectively.
• Though the motion of water is in horizontally and forward direction, the pseudo force will be in opposite direction.
• Hence the net force on left wall is equal to summation of F1 and the pseudo force ma where m is the mass of water. i.e
• $(F 1+m a)$ which means that force on left wall is greater than the force on the right wall. So the answer is $F 1>F 2$.