Physics, 13.07.2020 20:01 eduardo60

1.Is the pressure exerted by liquid same at all places? Where is the pressure exerted by liquid higher? Why do you think so?

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Answer from: ronaldo22

Answer liquid pressure is not same at all places

Explanation:

Liquid pressure increases with decreasing height as the lower you go, the more is the pressure exerted by the column of liquid above. The liquid pressure is the higher at low depth.ex. In the depths of the seas and oceans.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

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