Hello nepal. Welcome to PF !nepal said:Homework Statement
Starting from rest , a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is ,
a)0.275
b)0.75
please answer with working
Homework Equations
The Attempt at a Solution
Friction is a force that resists the motion of objects when they come into contact with each other. It is caused by the roughness of the surfaces in contact.
Friction can make it more difficult for an object to move up an inclined plane, as it creates a resistance force that opposes the object's motion. This means that the object will require more force to move up the inclined plane.
Friction can be reduced on an inclined plane by using a smoother surface, such as a lubricant, or by reducing the weight of the object moving up the plane.
The coefficient of friction is a value that represents the roughness of a surface and the amount of friction it produces. It is a dimensionless number and can range from 0 (perfectly smooth) to 1 (extremely rough).
The steeper the angle of an inclined plane, the more friction it will produce. This is because the weight of the object is acting more perpendicular to the surface, which increases the normal force and thus the friction force.