Tag: physics

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Questions Related to physics

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

When a plane moves along the runway, the air above the wing speeds up more, So the pressure

  1. Lowers

  2. Increases

  3. Raises

  4. No Pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
According to Bernoulli's theorem        $ P + \rho gh+ \dfrac{1}{2}\rho v^2= constant$
$\implies$  When $v$ is increases, then pressure $(P)$ is lowers.
Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure


when an air particle speeds up, it actually pushes            . Complete the sentence

  1. Less

  2. More

  3. Inside

  4. Outside
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Bernoulli's theorem        $ P + \rho gh+ \dfrac{1}{2}\rho v^2= constant$
$\implies$  When $v$ is more, then pressure $(P)$ is less.
Thus when an air particle speeds up, it actually pushes less.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

wherever the air pressure is higher, there will be a stronger force or push against an object. Is the statement True or False

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pressure      $P = \dfrac{F}{A}$                $\implies P \propto F$

Thus greater the pressure, stronger will be the force.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The ordinary pressure of air surrounding us is

  1. 15 pounds

  2. 16 pounds

  3. 14.2 pounds

  4. 14.7 pounds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$Answer:-$ D

The ordinary pressure of the air surrounding us is 14.7 pounds per square inch, but the pressure can change when the wind blows or an object, like a car or airplane, accelerates.

One important principle to remember is that wherever the air pressure is higher, there will be a stronger force or push against an object. It’s also helpful to know that when an air particle speeds up, it actually “pushes” less. Imagine that fast-moving air particles are in so much of a hurry that they don’t have time to apply force. This principle is used in airplane wings to make planes fly. When a plane moves along the runway, the air above the wing speeds up more, lowering the pressure, so that the air below the wing can push the plane upward.