expalin any two of contact force and non contact force
Answers
Explanation:
*****contact force:
1)Frictional Force: Friction is a force exerted by a surface against the motion of a body across its surface. Friction is the reason why your car comes to a standstill if you don’t press the accelerator. The frictional force is opposing the rotation of the wheels of your car. Therefore if you leave the accelerator, the friction slowly removes all the force from the car and when it has removed the last bit of force, the car comes to a standstill. Another example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion causing it to stop sliding after a finite distance. Friction is a type of contact force only.
2)Applied Force: Force which is applied to an object by another object. A person pushing a barrel is an example of applied force. When the person pushes the barrel then there is an applied force acting upon the barrel. The applied force is the force exerted on the barrel by the person and it responsible for the motion of the barrel. Applied force may be contact force as well as non – contact force.
*****Non-Contact Forces
1)Gravitational Force
Gravitational force is responsible for bringing the items we toss into the air back to earth. When an object is resting on a surface it is exerting a downward force equal to its weight and this downward force is known as Gravitational force.The gravitation is a force of attraction that exists between all bodies that have mass. The gravitational force of the sun keeps the Earth and all the other planets of the solar system is a fixed orbit. Gravitational force does not need to be in contact to exert its downward force.
2)Electrostatic Force
The electrostatic force is very similar to gravitational force, the difference here being that gravitational force acts between masses and electrostatic force acts between two charged bodies.
Answer:
- A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar example of a non-contact force is gravity, which confers weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.