00:01
In the first question we have to draw the free body diagram.
00:04
So there is a block which is been pushed with a force f1 and there is a frictional force.
00:17
So there is a frictional force f and we have the weight acting downward and the normal force of course.
00:28
So this is the first answer, the free body diagram.
00:32
Next we have to calculate whether the body will move or not.
00:37
So to calculate that we have to first calculate the static friction that is f s is equal to mu times n and n is directly equal to m g here.
00:52
So it will be mu m g.
00:55
So we have been given the value of mu to be equal to 0 .4 and the mass of the object is equal to 7 kg's.
01:06
So we will input it and let f s is equal to 27 .44 newton.
01:16
Given the value of this force f1 is equal to 50 newton so obviously this force is greater than ff so there will be motion.
01:27
So body will move right answer will be body will move now for the third answer so we have to find what is the magnitude of the kinetic friction if given mu k, that is the coefficient of kinetic friction is 0 .1...