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A contact force? The answer really depends on the level of the question. Primary school answer: A pushing or pulling force, or a friction force occur when objects touch. High school answer: Same as above, but 'pushing' and 'pulling' would be replaced with positive and negative. Friction would be defined as a force that opposes motion, and would include air resistance and drag. University answer: Technically, there is no such force, as all forces act at a distance without touching. In fact, objects don't actually 'touch' one another at all. The outer electrons in an object's atoms will repel said electrons from another object's atoms through the electromagnetic force. This only makes it feel like the objects have come into contact with one another, when in fact they haven't.
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What are contact forces and which forces are contact?
Contact forces are forces that can only have an effect on objects that they touch, such as when you contact a box and apply force to move it. you might apply a contact force to bend, tear, stretch, compress, or twist and abject. Tension force, friction force, and elastic force are examples of contact forces.
A force that pulls objects towards each other?
At the macro level, there are only two forces that cause objects to be attracted toward each other:gravity applies to all objects; andmagnetism applies only to certain materials.
How can you say that gravitational force is a field force?
It is true that the force of gravity can be described as a force field. Any object having mass will create a gravitational attraction in all directions, with decreasing intensity as the distance from the object increases. Fields are like that. It is different from a force that results from being hit by a baseball, which is exerted only at a specific location.
This type of force needs to touch something to affect it?
A contact force, such as friction. If a car wheel wasn't on the ground there couldn't be friction. A non-contact force could be magnets, the two magnets don't need to touch to repel or attract :)
To every action force is there an equal and opposite reaction force that is the law of conservation of momentum?
No, that is Newton's Third Law of Motion. The Law of Conservation of Momentum is that within a contained set of objects, the total momentum never changes. Objects can only transfer energy to each other, they can never really "get rid" of it.
Are forces only exerted when objects touch each other?
No...
What is the force exerted only when two objects are touching?
The force exerted only when two objects are touching is called friction. Friction occurs as a result of the resistance between the surfaces of the objects when they move against each other.
What is the name of the natural pulling force exerted by objects on one another?
One such force is gravity; basically, gravity is the ONLY force that affects ALL objects.
What forces only have an affect on objects that they touch?
Contact forces, such as friction, normal force, tension, and applied force, only have an effect on objects they touch. These forces require physical contact between objects to manifest and influence the motion or deformation of the objects involved.
What is a force called that requires a touch?
A force that requires a touch is known as a contact force. This type of force only occurs when two objects are in physical contact with each other, such as friction, tension, or normal force.
Do objects accelerate only when a force is exerted upon it?
Yes, according to Newton's second law of motion, an object will only accelerate if a net force is applied to it. If no force is present, an object will maintain its state of motion (either at rest or moving at a constant velocity).
Are objects lighter in water than in air?
Yes, objects are generally lighter in water than in air due to the buoyant force exerted by the water. This force opposes the gravitational force on the object, making it feel lighter in water.
Is the mutual gravitational force exerted by a pair of objects affected by the nature of the inverting medium?
Inverting? I assume you mean the surrounding medium, or the medium in between. No; the gravitational force depends ONLY on the masses, and on the distance. Of course, anything between the two objects may exert forces OTHER than the gravitational force.
What is a type of force needs to touch something to affect it?
Contact force. This force only acts upon objects that are in direct physical contact with each other. Examples include friction, tension, and normal force.
When a force is exerted on an object work is done only if the object?
Experiences a displacement in the direction of the force.
What is the force exerted by the object you are trying to move?
The force exerted by an object you are trying to move is its weight, which is equal to the mass of the object multiplied by the acceleration due to gravity (9.8 m/s^2 on Earth). The force needed to move the object must be greater than or equal to its weight to overcome friction and inertia.
Why is the work output less when a force is exerted at an angle than when the force is exerted parallel to the direction of motion?
Because only a part of force (see vector analysis) is being used to do the desired work.
