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Which of the following is NOT correct about force?
1. Force is a scalar quantity
2. Force may change the direction of motion of an object
3. Force may change the shape of an object
4. Force may make an object move from rest

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Correct Answer - Option 1 : Force is a scalar quantity

The correct answer is Force is a scalar quantity.

  • Force 
  • Force is that which changes or tends to change the state of the rest of a body.
  • F=ma, where 'F' is the force, ''m is the mass of an object, and 'a' is the acceleration.
  • The unit of force is Newton.
  • A force has both magnitude and direction.
  • Force is a vector quantity.
  • Force is primarily divided into two types. They are contact forces and non-Contact Forces.
    • Contact Forces: Forces that act on a body either directly or through a medium are called contact forces. Examples of contact forces are Frictional force, Tension force, Mechanical force, Normal force, Spring force, Air-resistance force.
    • Non-Contact Forces: Forces that act on a body without making direct contact are called non-contact forces. Example of non-contact forces is Gravitational force, Electrostatic force, Magnetic force.

  • The effects of force on an object
    • The force increases the speed of a moving object or it may also move the stationary object.
    • Force can either stop or slow down the moving object.
    • The effect of force changes the direction of a moving object.
    • Force changes the shape and size of the object.

  • The concept of force is explained by Isaac Newton.
  • The nuclear force is the strongest force in nature.
  • Gravitational force is the weakest force in nature.
  • Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

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