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Correct option is A. contact. The frictional force is a contact force that acts in the opposite direction to the motion of an object. This force can cause objects in motion to come to rest, as they act in the opposite direction to its motion. E.g. - If you roll a ball on a surface, it would come to rest after a short while.
May 24, 2024 · Friction is a contact force because it occurs when two surfaces come into contact and interact with each other. It resists the motion or attempted motion of objects that are in contact with each ...
The angle between the resultant contact force and the normal force exerted by a body on the other is called the angle of friction. Show that, if λ be the angle of friction and μ the coefficient of static friction λ ≤ tan −1 μ.
The angle between the resultant contact force and the normal force exerted by a body on the other is called the angle of friction. Show that, if λ be the angle of friction and μ the coefficient of static friction λ ≤ tan −1 μ.
The nature of the surfaces in contact decides the friction force between them. It will be more if the surfaces in contact are rougher. Among them, the wet marble floor is least rough therefore will experience least force. Thus, the increasing order of roughness is wet marble floor, dry marble floor, newspaper and the most rough is towel.
Force exerted by a spring; Force exerted during collision; Force applied as a pull or push; Non Contact Force: The forces which act on bodies without being physically touched, are called the non-contact forces. The following forces come under non-contact forces : Gravitational Force; Electrostatic Force; Magnetic Force; Hence, the odd man out ...
The contact force exerted by a body A on another body B is equal to the normal force between the bodies. We conclude that (a) the surface must be frictionless (b) the force of friction between the bodies is zero (c) the magnitude of normal force equal that of friction (d) the bodies may be rough but they don't slip on each other.
Over here, the friction is some fraction of the perpendicular force that acts between two objects (we determine the fraction by a number known as the coefficient of friction). Generally, the force is independent of the contact area and does not depend on how fast the two objects are moving. Friction also acts in stationary objects.
3. Does the force of friction change if the contact area is increased? No, the force of friction remains the same regardless of the contact area. As mentioned earlier, it is the force pressing the two surfaces together that determines the strength of the frictional force, not the contact area. 4. Can friction be reduced by increasing the ...
The block of mass m kg is being pulled by a horizontal force F = 2 mg applied to a string as shown in figure (Take g = 10 ms − 2). The pulley is massless and is fixed at the edge of an immovable table with a supporting cable. What is the value of force exerted by the supporting cable (rod) on the pulley (in Newton).
