Gravitation - 01

Upthrust on a body depends on

• Density of the liquid

• Volume of the body

• Density of the body

• Both B & C

A solid exerts pressure of 20 Pa on a surface of 2m² . Find its weight.

• 30 N
• 50 N
• 40 N
• 80 N

On what principle are lactometer and hydrometer based on

• Newton's law

• Archimedes' principle

• Pascal's law

• Bohr's law

A body of mass 20kg is placed on an area 2m² . find the pressure executed.

• 50 Pa
• 200 Pa
• 150 Pa
• 98 Pa

Value of atmospheric pressure in pascal is ?

• 5 x 10⁵

• 2.013 x 10⁵

• 1.13 x 10⁵

• 5.013 x 10⁵

School bags have a broader base to reduce

• the size of the bag
• pressure on the shoulders and back
• the weight of the bag
• pressure on the feet and legs

The least value of apparent weight of a body in a fluid is

• >0

• =0

• <0

• depends on the density of solid and fluid

An object weighs 10N in air. When immersed fully in water, it weighs only 8N. The weight of liquid displaced by the object will be

• 2N
• 3N
• 10N
• 5N

Pressure inversely proportional to

• time
• weight

• Area

• volume

When is the pressure exerted said to be one pascal?

• When a force of one pound is applied to an area of one square inch
• When a force of one kilogram is applied to an area of one square meter
• When a force of one newton is applied to an area of one square meter
• When a force of one joule is applied to an area of one square centimeter