(b) What are the different types of forces?
Answers
Contact Forces
Action-at-a-Distance Forces
Frictional Force
Gravitational Force
Tension Force
Electrical Force
Normal Force
Magnetic Force
Air Resistance Force
Answer:
A force that moves or tends to move stops or tends to stop the motion of the object. The force can also change the direction of the motion of an object. It can also change the shape or size of the body on which it acts. Being a vector quantity it has magnitude as well as direction.
In classical physics, real forces are defined by a set of axioms, Newton’s laws of motion, with reference to an inertial reference frame. By Newton’s second law the resultant force F acting on a body of constant mass m is equal to ma, where a is the acceleration of a. Force is a vector quantity.
Forces are either long-range or short-range. Long-range forces, such as gravitation and the Coulomb force, fall off less rapidly than the inversion fourth power of the distance, short-range forces, such as those inside the atomic nucleus and those between molecules, fall off more rapidly than the inverse fourth power. It can be shown that in a condensed body, short-range forces are small at distances not much greater than those of near neighbors.