The pressure value is given by the equation,
Where,
represents the density of the liquid
g= gravity
h= Heigth
A) For the measurement of the guage pressure we have the data data,
Replacing we get,
P_g = 12395Pa[/tex]
In order to find the Absolute pressure, we perform a sum between the atmospheric pressure and that of the Gauge,
B) The atmospheric pressure at sea level is 101325Pa, assuming ideal conditions, we will take this pressure for our calculation, so
The ball's velocity at 2 sec is 30.4 m/s at (below the horizontal)
Explanation:
The motion of the ball is a projectile motion, therefore it consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction
This means that:
- The horizontal velocity of the ball is constant, and it is given by
where
u = 35 m/s is the initial speed of the ball
is the angle of projection
Substituting,
- The vertical velocity is changing, and its value is given by
where
is the initial vertical velocity
is the acceleration of gravity (negative because it points down)
t is the time
At t = 2 s,
where the negative sign means that at t = 2 s, the vertical velocity points down.
Now we can find the magnitude of the ball's velocity at 2 sec:
While the direction is given by
Learn more about projectile motion:
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