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What is the equation used to calculate pressure?
pressure=force/area
State one way to obtain greater moment of a given force about a given axis of rotation.
Increase the perpendicular distance of force from axis of rotation.
The atmospheric pressure at sea level is nearly
1,00,000 Pa
What do you mean by the clockwise and anti-clockwise moment of force?
Clockwise moment of force –When the moment of force is in the clock wise direction. Anticlockwise moment –when the moment of force acts in anticlockwise directi
How is the thrust related to pressure?
Pressure is directly proportional to thrust. i.e. greater the thrust, greater is the pressure and smaller the thrust, smaller is the pressure.
A sharp pin works better than a blunt pin. Explain the reason.
A sharp tip is provided at the end of a pin so that pressure [force/ area] exerted by it is maximum when it is pressed by a given force.
What do you mean by atmospheric pressure?
“The thrust due to atmospheric air on unit area”
State any one factor which affect moment of force.
The magnitude of the force applied or The distance of line of action of the force from the axis of rotation.
Sate any one effect of a force when applied on a body
It can change the state of body. or A force can change the shape (and size) of an object.
What is the unit of pressure
N m-2
What is the unit of thrust
kgf
What is the atmospheric pressure on earths surface
nearly 10⁔ Pa
1 kgf = N (nearly)
10
What is the S.I. unit of pressure
pascal
What is the S.I. unit of force
newton


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