Question

Identify and sketch all the external forces acting on the chair. because the chair can be represented as a point particle of mass m, draw the forces with their tails centered on the black dot in the middle of the chair. be certain to draw your forces so that they have the correct orientation.

Answer 1

There are two external force acts on the chair.

1. The force due to earth gravity, acts in the downward direction.

2. Reaction force of the gravity, which acts in the Upward direction (Normal Force).

On every object, there is a force acts due to gravity of earth, which pulls the object towards the centre of earth, known as gravity force, always acts in the downward direction. Mathematically it's given as

F=mg

here, m is the mass of the object, and g is the acceleration of gravity.

To balance this gravity force, a counter force acts in the opposite direction, whose magnitude is equal to the force of gravity

Answer 2

 The two forces will act on the chair i.e. $mg$ and $N$.

Further Explanation:

Free body diagram is the graphical representation or illustration of all the forces applied on the body with their directions. This helps us to visualize all the applied forces on the body with their directions and make us possible to solve complex problems based on kinematics.

The normal force which is always perpendicular to the surface of the object and there is force due to gravity of the earth which pulls the object toward the center of the earth given by $F=mg$. Its magnitude depends upon the mass of the body and expressed as mg. Here, the term $g$ is called acceleration due to gravity and it has a constant value of $9.81{\text{ m/}}{{\text{s}}^{\text{2}}}$ .

Concept:

The chair is represented as a point particle of mass $m$.

The diagram is drawn as shown in Figure 1.

The chair has two forces acting in two directions, upward and downward direction.  

• The upward normal force or the reaction force.

• The downward force due to gravity of the earth.

The normal force is equal to the magnitude of the force due to gravity but opposite in direction to balance the force due to gravity.

Learn more:

1. Find the net force. https://brainly.in/question/8668644

2. The net force on free body diagrams. brainly.com/question/12345810

3. Acceleration of the object. brainly.com/question/11599933

Answer Details:

Grade: Collage

Subject: Physics

Chapter: Kinematics

Keywords:

Identify, sketch, external, forces, acting, chair, represented, point particle, mass, m, draw, tails, centered, black, dot, middle, certain, correct, orientation, upward, normal, reaction force, downward, force due to gravity, gravity force.