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SSC MTS Physics — Everyday Concepts

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This page covers SSC MTS Physics — Everyday Concepts with complete concept notes, 15 graded practice MCQs, key points and exam-specific tips. Free to study.

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Concept Notes

Physics — Everyday Concepts— Rules & Concept

1.Core Concept

Read this first — the foundation of the topic

Pressure is a fundamental physics concept that appears regularly in SSC CGL exams. It measures how much force is applied per unit area. Think of it as 'force concentration' - the same force spread over a smaller area creates higher pressure. Core Concept: Pressure = Force ÷ Area. When you press a drawing pin into a board, the sharp point creates high pressure because the same force is concentrated on a tiny area. This is why pins pierce easily but your finger pressing with the same force cannot.

2.Key Rules

Core rules you must know cold

Pressure is directly proportional to force and inversely proportional to area. Double the force, double the pressure. Double the area, halve the pressure. Pressure acts in all directions in fluids (Pascal's Law).

At any point in a stationary fluid, pressure is the same in all directions.

3.Formula Block

Memorise — at least one formula appears in every paper
Pressure (P) = Force (F) ÷ Area (A)
Fluid Pressure = Density × g × Height
Atmospheric Pressure = 1.013 × 10^5 Pa = 760 mm Hg

Units: Pascal (Pa), N/m², Bar, Atmosphere, mm Hg

4.Exam Patterns

What examiners ask — read before attempting PYQs

SSC asks about atmospheric pressure values, pressure applications (hydraulic systems, barometers), and calculation problems. Questions often involve pressure differences at heights, pressure in liquids, and practical applications like syringes, pumps.

5.Shortcuts

Use these to save 30–60 seconds per question

Remember 'FAPA' - Force and Area are in Pressure Always. Increase Force = Increase Pressure. Increase Area = Decrease Pressure.

For fluid pressure, remember 'DGH' - Density × Gravity × Height.

6.Worked Example

Solve this step-by-step before moving on
1
Step 1

Identify given values - Force = 200 N, Area = 4 m²

2
Step 2

Apply formula - Pressure = Force ÷ Area

3
Step 3

Substitute values - Pressure = 200 ÷ 4

4
Step 4

Calculate - Pressure = 50 N/m² or 50 Pa Another Example: If the same 200 N force acts on 2 m² area instead: Pressure = 200 ÷ 2 = 100 Pa Notice: Half the area means double the pressure. Shortcut for Unit Conversion: 1 Bar = 10^5 Pa. For quick conversion, Bar to Pa - add 5 zeros. Pa to Bar - remove 5 zeros.

7.Exam Traps

Common mistakes students make — avoid these

Students often confuse force with pressure. Remember - force is push or pull, pressure is force per unit area. Another mistake is forgetting that liquid pressure depends on depth (height of liquid column), not the total volume.

A thin tube and wide tank at same depth have equal pressure at bottom. Practical Applications tested: Hydraulic brakes work on Pascal's law. Barometers measure atmospheric pressure. Syringes work due to pressure difference.

Mountain climbers face low pressure at heights. Deep sea divers face high pressure underwater.

Key Points to Remember

  • Pressure = Force ÷ Area - fundamental formula for all pressure calculations
  • Atmospheric pressure at sea level = 1.013 × 10^5 Pa = 760 mm Hg
  • Liquid pressure = Density × g × Height, independent of container shape
  • Pascal's Law: Pressure applied to confined fluid transmits equally in all directions
  • High pressure created by small area (needle, knife) for cutting applications
  • Pressure decreases with altitude - 1% decrease per 80m height gain
  • Barometer measures atmospheric pressure using mercury column height
  • Hydraulic systems multiply force using pressure and area relationship

Exam-Specific Tips

  • Standard atmospheric pressure = 1.013 × 10^5 Pascal = 1.013 Bar
  • Mercury barometer reading at sea level = 760 mm Hg = 76 cm Hg
  • Pressure unit Pascal named after French scientist Blaise Pascal
  • 1 Bar = 10^5 Pascal = 0.987 atmosphere approximately
  • Density of mercury = 13,600 kg/m³ used in barometer calculations
  • Blood pressure measured in mm Hg using sphygmomanometer
  • Pressure at 10m underwater depth = 2 atmospheric pressure
  • Hydraulic jack multiplies force based on area ratio principle
Practice MCQs

Physics — Everyday Concepts — Practice Questions

15graded MCQs · easy to hard · full solution & trap analysis

All MCQs →
Practice 1easy

What is the SI unit of force?

Practice 2easy

Which physical quantity is measured in Hertz (Hz)?

Practice 3easy

What is the SI unit of temperature?

Practice 4easy

Which scientist formulated the law of universal gravitation?

Practice 5medium

Which of the following is the SI unit of electric current?

Practice 6medium

What is the phenomenon by which light bends when passing from one medium to another?

Practice 7medium

A person standing on the ground experiences a normal force from the Earth. According to Newton's Third Law, what is the reaction force to this normal force?

Practice 8medium

Which of the following statements about friction is correct?

Practice 9medium

A ball is thrown vertically upward. At the highest point of its trajectory, what is the velocity of the ball?

Practice 10medium

When a person stands in front of a plane mirror, the image formed is virtual, erect, and of the same size as the object. Which of the following statements about this image is INCORRECT?

Practice 11hard

In physics, the SI unit of force is the Newton (N). One Newton is equivalent to the force required to accelerate a mass of 1 kilogram at a rate of:

Practice 12hard

A person standing on the surface of Earth experiences gravitational acceleration of approximately 9.8 m/s². If the same person were standing on the surface of the Moon, the gravitational acceleration would be approximately:

Practice 13hard

When light travels from a denser medium (such as glass with refractive index n = 1.5) to a less dense medium (such as air with refractive index n = 1.0), the light bends away from the normal. This phenomenon is called:

Practice 14hard

A simple pendulum oscillates with a time period T. If the length of the pendulum is increased to 4 times its original length, the new time period will be:

Practice 15hard

A student observes that when a metal rod is heated at one end, the heat gradually spreads to the other end. Which of the following best explains this phenomenon and identifies the primary mode of heat transfer in solids?

60-Second Revision — Physics — Everyday Concepts

  • Formula: Pressure = Force ÷ Area, units Pascal or N/m²
  • Remember: 1 atm = 1.013 × 10^5 Pa = 760 mm Hg
  • Liquid pressure depends only on depth, not container shape or volume
  • Pascal's Law: Pressure transmits equally in all directions in fluids
  • Applications: Hydraulic brakes, barometers, syringes all use pressure principles
  • Trap: Don't confuse force with pressure - pressure is force per unit area
  • Quick conversion: 1 Bar = 10^5 Pa (add/remove 5 zeros)
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