A point A on a sphere of weight w rests in contact with a smooth vertical wall and is supported by a string joining a point B on the sphere to a point C on the wall. Draw free body diagram of the sphere.
Category
📚
LearningTranscript
00:00Hi guys, someone great once said, life is what you make of it.
00:06Make Monday morning the best of your day and work day.
00:11There is a term in dynamics of motion known as free body diagram.
00:15This time, we will talk about it.
00:20We see a solid ball hung on a rope attached to a wall.
00:24Well, we are asked to draw a free body diagram of this system.
00:30Let's go to the discussion sheet.
00:34A free body diagram or FBD consists of a diagrammatic representation of a single body
00:40or a subsystem of bodies isolated from its surroundings showing all the forces acting on it.
00:47This system consists of a single body, namely the ball.
00:51So we will identify what forces are acting on the ball.
00:57The ball is around the earth.
00:59The ball will get a gravitational force towards the center of the earth.
01:03We often write the gravitational force as W.
01:09The rope is in a tense condition.
01:11The molecules of the rope will pull the ball in accordance with the direction of the rope.
01:16This pull is known as the tension force of the rope, often symbolized as T.
01:23The ball does not penetrate the surface of the wall.
01:26It means the normal force acts in the direction normal to the contact surface.
01:31This force is often written as N.
01:36It seems that there are no other forces besides these three forces.
01:41This is the free body diagram of the ball.
01:46In the analysis of motion dynamics, we must draw the free body diagram correctly.
01:51Happy learning everyone!