Force is not needed to keep an object moving. Types of force forces are broadly classified into two types Counter force that appears when an external force tends to slide a body along a surface
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It is directed parallel to the surface and opposite to the sliding motion.
Force exerted by a spring
Fs = kx, where k is a constant and x is the displacement from the equilibrium position The negative sign indicates that the force is in the direction opposite to the displacement. Ask how is the object interacting with the surroundings A force is a push or pull that acts upon an object as a result of its interaction with other objects
Most significant when one or both objects are very massive Always acts downwards on objects
