Answer:
The normal force N1 exerted by the floor is
The normal force N2 exerted by the wall is
The frictional force exerted by the wall is
Explanation:
From the question we are told that
The length of the ladder is
The weight of the ladder is
The distance of the ladder position on the wall from the floor is
The mass of the person is
Applying Pythagoras theorem
The length of the position the ladder on the ground from the base of the wall is
substituting values
In order the for the ladder not to shift from the ground the sum of the moment about the position of the ladder on the ground must be equal to zero this is mathematically represented as
Now the force exerted by the floor on the ladder is mathematically represented as
substituting values
Now the horizontal forces acting on the ladder are and they are in opposite direction so
I believe its air particles
B. the sum of the protons and the neutrons in one atom of the element
Answer:
<em>Surface</em> tension is the result of water molecules pulling inward with a strong attractive force.
The <em>attractive</em> force brings the molecules on the surface of the water close together.
The <em>attractive</em> force causes the surface of the water to be drawn toward the water molecules beneath the surface.
<em>Since</em> there are no water molecules above the surface, there are uneven forces. This causes surface tension, allowing the coin to float on the water’s surface.