Question

Specific force is __________ to mass flow rate.

(a) Directly proportional

(b) Inversely proportional

(c) Independent

(d) Not proportional

I got this question in class test.

I would like to ask this question from Specific Force topic in section Non Uniform Flow in Channels of Fluid Mechanics

Answer 1

Right option is (a) Directly proportional

To explain I would say: Specific force is directly proportional to the mass flow rate. Specific force is defined as the force that is expressed in terms of it momentum. It is the momentum of flow passing through a channel of cross section per unit time per unit weight and a second is the force per unit weight.