00:01
Friction is a force that oppose the motion of an object.
00:04
In this problem, we're given with a force that is, which magnitude is 7 .50 newton, is acted 25 degrees below the horizontal.
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The mass is lying flat on a horizontal surface.
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The most massive, the greatest mass that this force can move is 48 kilograms.
00:25
We want to find the coefficient of friction between the mass and the surface.
00:30
So let's first find or draw the pre -body diagram with the mass at the origin of this cartesian axis.
00:43
So the forces acting on it are the weight is acting downward, the normal force, it's acting upward, the friction acting, acting say in the direction opposite to where the force of 750 newton is acting, and the 750 newton force which is going this way.
01:09
The angle is can be drawn right here.
01:16
So we require that the force, the component of the force that is along the direction or along the axis where the friction is must be enough to counter the friction.
01:30
So that component is, let's say, of x.
01:34
So we require that fx is equal to the friction in order for the mass to to move so from geometry this component of force of applied force fx is solved as f times cosine data so you have f cosine theta equals the fictional force now fictional force is equal to product of the coefficient of static friction and the normal and the normal force...