Please answer this question with brief explanation 1. From F = A v / h equation,
ID: 1781448 • Letter: P
Question
Please answer this question with brief explanation
1. From F = A v / h equation, where is the viscosity, if double the speed of moving plate, while keeping the force we apply the same. Which of the following individual changes(not in combination) would allow this to happen. Select all that apply.
double the plate area
halve the plate area
double the depth of the fluid
halve the depth of the fluid
change the temperature, such that the fluid viscosity doubled
change the temperature, such that the fluid viscosity halved
Explanation / Answer
F = (n*A*v) / h
speed of the moving plate is doubled
means repalce v by 2v
F is constant.
For this to happen, we have to replace h by 2h.
which means double the depth of the fluid.
or half the plate area.
therefore, second option and third option are the correct answers.