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The force that opposes the motion of an object is called
1. Magnetic force
2. Muscular force
3. Gravitational force
4. Frictional force

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Correct Answer - Option 4 : Frictional force

The correct answer is Frictional force.

  • The Force that opposes the motion of an object is called frictional force.
  • Friction is caused by the irregularities on the two surfaces in contact.
  • Friction depends on the nature of surfaces in contact.
  • Force of friction is greater if a rough surface is involved.
  • The force of friction always opposes the applied force.

 

  • We walk on the ground due to the frictional force.
  • It is difficult to walk on a smooth and wet floor due to the absence of frictional force.
  • Frictional force helps a vehicle to stop with the sudden breaks.
  • The substances which reduce friction are called lubricants.
  • The frictional force exerted by fluids is also called drag.
  • Fluid friction can be minimized by giving suitable shapes to bodies moving in fluids.

  • The force that pulls the body towards the earth is called the gravitational force.
  • Magnetic force is the force of attraction or repulsion between electrically charged particles due to their motion.
  • Muscular force is the force exerted using our body parts like arms or legs.

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