Question

what force is shown by the arrow?
o tension
o normal
o air resistance
o gravity

Explanation:

• Tension: Tension is a force that acts along the length of a medium (like a rope) when it is pulled tight. In the given image, there is no rope - like object being pulled, so it is not tension.
• Normal force: The normal force is a contact force that acts perpendicular to the surface of contact. In the case of the chair, the chair exerts a normal force on the person sitting on it (upward, perpendicular to the seat of the chair).
• Air resistance: Air resistance is a force that opposes the motion of an object through the air. There is no indication of motion through the air in the image.
• Gravity: Gravity is a force that acts downward towards the center of the Earth. The arrow in the image is pointing upward, so it is not gravity.

Answer:

normal