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3 years ago

What is pressure? A)Shown in picture B)Shown in picture C)Shown in picture D)Shown in picture

Physics

1 answer:

mr Goodwill [35]3 years ago

6 0

Answer:

The force exerted on a given area.

Option B is the right option.

Explanation:

<h2>About pressure</h2>

Pressure is defined as force acting per unit area. It's SI unit is Pascal or N/m^2.

Formula to find pressure is:

$\frac{thrust(f)}{area(a)}$

The force acting perpendicular on a surface is called the thrust. It is a vector quantity.

One Pascal pressure

One Pascal pressure is defined as the pressure exerted in a surface of area m^2 by the thrust of 1 N

Hope this helps ..

Good luck on your assignment.....

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Answer:

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2) Option d. Both B & C

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Question 1)

Acceleration is defined as the rate of change of velocity with respect to time.

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When an object is thrown up, its velocity is maximum at the initial point and decreases as the object moves up. Since, the velocity is decreasing, the acceleration will be negative. This can also be proven from the formula mentioned above. When the object is thrown up, initial velocity(vi) is maximum and the final velocity (v_f) is zero, as the object rests for a very tiny moment at its maximum point. This will give a negative numerator and hence the value of acceleration will be negative.

When an object is thrown down, its velocity is zero at the start of the motion and increases as the object falls down. Since, the velocity is increasing in this case, the acceleration will be positive.

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Question 2)

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