Question

State the type of force acting on the box based on the
resultant force.
​

Answer 1

A ‘Force’ is a vector quantity that can be described as a push or pull on an object resulting from the object’s interaction with another object. Whenever there is an interaction between two objects, the objects experience an equal and opposing force on each other. In other words both the objects ‘exert force’ on each other. Force only exists as a result of an interaction. If there is no interaction, the objects no longer experience the force. Force is measured in units called Newtons (N), named after the famous scientist Sir Issac Newton.

Check out our detailed article on Force here.

Interactive Nature of Force

For force to exist, there must be an interaction between at least two objects. This interaction between the objects may or may not be physical. Pulling a rope or hitting a ball with a bat come physical interaction whereas forces like the magnetic force, electrostatic force, etc come under non-physical force.

Learn about different types of Forces here.

A force has both magnitude and direction. The magnitude of the force expresses the strength of a force. To completely determine a force both direction and magnitude must be specified; since the direction or magnitude of the applied force changes its effects.

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Force and its effects

Types of forces

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Addition and Subtraction of Forces

‘Net Force’ is the total force exerted.

Therefore in the given diagram,

For the block A, the net force acting is F1+F2 . The two forces are added since the force is exerted in the same direction.

And, for the block B, the net force acting is F1−F2. The two forces are subtracted since the forces are applied in opposite directions. (Diagram in Attachment 1st pic)

Note-Second image.. forces and pressure