Question

a man climbs a tree. mention the action and reaction​

Answer 1

Answer:

I’ll assume the man is wearing gloves so that he will not get splinters in his hand from from the wood. So, assuming that he is climbing without any harnesses and just his gloves and shoes, he exerts a force perpendicular (makes an angle of 90° ) with a line tangent (only intersects a circle or arc in just one point) to the surface of the tree, pointing into the center of the tree. This force is commonly known as the normal force and directly correlates to the friction between the man’s gloves and the tree. In other words, the more normal force is exerted into the tree, the more friction force is generated between the gloves and the tree’s surface until it reaches a certain value equal to uN (u is the maximum coefficient of static friction [friction of matter that does not move] and is affected by the types of surfaces in contact and N is the maximum normal force exerted by a surface at a point in contact with another surface without destroying the surface of the other material at the point in contact). The man needs friction because it is the only force preventing him from slipping off the tree and falling to the earth’s surface due to gravity. If you want to know the direction of friction, it is parallel to the tree’s surface and points in the opposite direction of gravity. Additionally, the tree also exerts the normal force on the gloves as well, also pointing 90° from a line tangent to the tree’s surface and away from the center of the tree. Hopefully, this answers your question about the forces at work while a man is climbing a tree. Although, I wonder why this man is climbing a tree instead of using a ladder to get up there