A)Has force only magnitude or both direction and magnitude ?
B)What is necessary condition for a force to come into play?
C)on the basis of interaction what are the two categories of forces?
D)What should happen if there were no force of friction?Imagine and describe in your own words?
A)Has force only magnitude or both direction and magnitude ?
B)What is necessary condition for a force to come into play?
C)on the basis of interaction what are the two categories of forces?
D)What should happen if there were no force of friction?Imagine and describe in your own words?
A)- Force have both direction and magnitude bevause a force is a vector quantity. A vector quantity is a quantity which has both magnitude and direction. To fully describe the force acting upon an object, you must describe both its magnitude and direction. Thus, 10 Newtons of force is not a complete description of the force acting on an object. 10 Newtons, downwards is a complete description of the force acting upon an object. (Note: What is the difference between vector and scalar quantities? A vector has both strength and direction, a scalar quantity can be described using only 1 quantity, magnitude. Examples of scalar quantities are: time, energy and volume since they only represent magnitude and no direction.
B)- An interaction of one object with another object results in a force between the two objects .
In other words, A force will arise due to interaction between two objects.If there is no interaction between two objects , no force can show it's effect.
Eg:
Weightlifter uses muscular force to lift the weights.
C)- On the basis of interaction forces can be placed in two broad categories:
1- Contact forces:-are types of forces in which the two interacting objects are physically contacting each other. Examples of contact forces include frictional forces, tensional forces, normal forces, air resistance forces, and applied forces.
2- Action-at-a-distance forces:- are types of forces in which the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite a physical separation. Examples of action-at-a-distance forces include gravitational forces, electric force, magnetic force.
D)- If there were no friction many problems could have been arise, as one cannot able to walk if there were no friction at all. One could not write with pen or pencil, if there were no friction. When one is writing with chalk on the blackboard, its rough surface rubs off some chalk particles. So, we can see the writing on the blackboard. If any object just started moving, it would never stop. Had there been no friction between the tyres of the automobjles and the road, they could not be started or stopped or turned to change the direction of motion. One could not fix a nail in the wall or tie a knot. Without friction no building could be constructed.
(Note: What is the difference between vector and scalar quantities? A vector has both strength and direction, a scalar quantity can be described using only 1 quantity, magnitude. Examples of scalar quantities are: time, energy and volume since they only represent magnitude and no direction.
B)- An interaction of one object with another object results in a force between the two objects .
In other words, A force will arise due to interaction between two objects.If there is no interaction between two objects , no force can show it's effect.
Eg:
Weightlifter uses muscular force to lift the weights.
C)- On the basis of interaction forces can be placed in two broad categories:
1- Contact forces:-are types of forces in which the two interacting objects are physically contacting each other. Examples of contact forces include frictional forces, tensional forces, normal forces, air resistance forces, and applied forces.
2- Action-at-a-distance forces:- are types of forces in which the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite a physical separation. Examples of action-at-a-distance forces include gravitational forces, electric force, magnetic force.
D)- If there were no friction many problems could have been arise, as one cannot able to walk if there were no friction at all. One could not write with pen or pencil, if there were no friction. When one is writing with chalk on the blackboard, its rough surface rubs off some chalk particles. So, we can see the writing on the blackboard. If any object just started moving, it would never stop. Had there been no friction between the tyres of the automobjles and the road, they could not be started or stopped or turned to change the direction of motion. One could not fix a nail in the wall or tie a knot. Without friction no building could be constructed.
