8TH FORCE AND PRESSURE

NAME

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If we apply force against the direction of motion of the body, then the body will

• a) stop moving
• b) move with an increased speed
• c) move with a decreased speed
• d) move in a different direction

2. Pressure exerted by a liquid is increased by

• a) the density of the liquid
• b) the height of the liquid column
• c) Both a and b
• d) None of the above

Unit of pressure is

• a) Pascal
• b) Nm–2
• c) Poise
• d) Both a and b

The value of the atmospheric pressure at sea level is

• a) 76 cm of mercury column
• b) 760 cm of mercury column
• c) 176 cm of mercury column
• d) 7.6 cm of mercury column

Pascal’s law is used in

• a) hydraulic lift
• b) brake system
• c) pressing heavy bundles
• d) All the above

Which of the following liquids has more viscosity?

• a) Grease
• b) Water
• c) Coconut oil
• d) Ghee

7. The unit of viscosity is

• a) Nm2
• b) poise
• c) kgms–1
• d) No unit

The pressure of a liquid column __________ with the depth of the column.

• Increases
• Pascal
• capillarity action
• torricelli

Hydraulic lift works under the principle of __________.

• Increases
• Pascal
• capillarity action
• torricelli