Moment of Force and Pressure

If the Pressure is 50 Pa, and area is 5 cm² Find thrust.

• 10N

• 250N

• 20N

• 25N

A force of 20N is acting on a wheel to rotate it about an axle passing through its centre anticlockwise and diameter of wheel is 5m, find moment of force.

• 100Nm

• 50Nm

• 25Nm

• 10Nm

It is easier to open a nut using

• A wrench of longer handle

• A wrench of shorter handle

• Any wrench

• Wrench with a hammer

Bus is provided with six tyres

• To increase area

• To decrease pressure on ground

• All of these

The normal atmospheric pressure is

• 76 cm Hg

• 760mm Hg

• 1 atm

• 10⁵ Pa nearly

• All of these

We do not feel atmospheric pressure

• Blood pressure is more than atm Pr.

• Blood pressure is less than atm. Pr.

• Blood pressure is equal to atm Pr.

Atmospheric pressure ____ with increase in altitude.

• Increases

• Decreases

• Remains same.

Pressure due to liquid

• Increases with depth

• Act in all direction

• Is due to collision of liquid molecules with walls of vessel

• All of these

If the area is 10cm² and pressure is 1000N, find thrust.

• 10000 N

• 100 N

• 1N

• 10N

Pressure due a liquid is more if

• Density of liquid is less

• Does not depend on density and only on depth

• Density of liquid is more.