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Force

Force | General Awareness for SSC CGL

It is an external push or pull which can change or tries to change the state of rest or of uniform motion. SI unit is newton (N) and CGS unit is dyne. 1 N = 105 dyne.
If sum of all the forces acting on a body is zero, then body is said to be in equilibrium.

Four fundamental forces in nature:

  • Gravitational force
  • Electromagnetic force
  • Weak nuclear force
  • Strong nuclear force (the strongest of the four)

Centripetal Force

Force | General Awareness for SSC CGL

During circular motion, a force directed towards the center of the circular path acts on the body, known as centripetal force.
Force | General Awareness for SSC CGLwhere, m = mass of the body.

Centrifugal Force

In circular motion, a force appears to act outwardly opposite to the centripetal force, called centrifugal force. This is an apparent or pseudo force.

Applications of Centripetal and Centrifugal Forces

  • Cyclists incline from vertical to obtain the required centripetal force, slow down to take safe turns, and move on a larger radius path to balance reduced friction due to bending.
  • Roads are banked at turns to provide the necessary centripetal force, with the normal reaction force component contributing to this force.
  • Frictional force between vehicle tires and the road acts as centripetal force during a turn on a curved road.
  • If a car exceeds the safe speed limit on a turn, the inner tires, experiencing a larger centrifugal force due to a smaller radius, may skid.
  • When a bucket of water is revolved rapidly in a vertical plane, centrifugal force prevents water from falling out, even when inverted.
  • Electrostatic force acts as centripetal force for the orbital motion of electrons around the nucleus.
  • During the rotation of milk, lighter cream particles move towards the center while heavier milk particles move to the circumference, resulting in cream separation.
  • The gravitational force between the Earth and the Sun acts as the centripetal force for Earth's revolution around the Sun.
  • Torque is the product of force and the perpendicular distance from the axis of rotation, producing a rotational effect. It is a vector quantity.

Question for Force
Try yourself:
Which force is responsible for the separation of cream from milk when rotated rapidly in a vertical plane?
View Solution

The document Force | General Awareness for SSC CGL is a part of the SSC CGL Course General Awareness for SSC CGL.
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FAQs on Force - General Awareness for SSC CGL

1. What is the SSC CGL exam?
Ans. The SSC CGL exam, or Staff Selection Commission Combined Graduate Level exam, is a national-level exam conducted by the SSC to recruit staff for various Group B and Group C posts in ministries, departments, and organizations of the Indian government.
2. What are the eligibility criteria for the SSC CGL exam?
Ans. To be eligible for the SSC CGL exam, candidates must have a bachelor's degree from a recognized university. The age limit varies depending on the post applied for, with relaxation for reserved categories.
3. How is the SSC CGL exam structured?
Ans. The SSC CGL exam is conducted in four tiers - Tier I (preliminary exam), Tier II (main exam), Tier III (descriptive paper), and Tier IV (skill test/ computer proficiency test). Each tier tests candidates on different subjects and skills.
4. What is the syllabus for the SSC CGL exam?
Ans. The syllabus for the SSC CGL exam includes topics such as Quantitative Aptitude, English Language, General Awareness, and Reasoning Ability. Candidates must prepare thoroughly for each section to score well in the exam.
5. How can I prepare for the SSC CGL exam effectively?
Ans. To prepare for the SSC CGL exam effectively, candidates should create a study plan, practice previous years' question papers, take mock tests, and stay updated with current affairs. It is also essential to focus on time management and revision to excel in the exam.
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