The length of the vector is proportional to the size of the force.
The wheelchair is not accelerating, so the forces on it are balanced.
In a free-body diagram of the wheelchair, force due to gravity points down, normal force points up, force pushing the wheelchair points forward, friction resisting the motion points backward.
For the force diagram:
- In picture 1: F gravity points down; F normal points up
- In picture 2: F gravity points down; F tension points up
- In picture 3: F gravity points down; F spring points up.
What are forces?
Forces are a push or pull agents that causes a change in the state of a body when they are applied to the body.
Unbalanced forces cause acceleration of a body.
In a free-body diagram, the mass (force) on an object is represented by a vector.
The length of the vector is proportional to the size of the force. Suppose you push a wheelchair forward at constant velocity. The wheelchair is not accelerating, so the forces on it are balanced. In a free-body diagram of the wheelchair, the vector for the force due to gravity points down, the vector for the normal force points up, the vector for your force pushing the wheelchair points forward, and the vector for the force of friction resisting the motion points backward.
Considering the picture visual representation of the forces between many interacting objects or the force diagram:
In picture 1: F gravity points down; F normal points up
In picture 2: F gravity points down; F tension points up
In picture 3: F gravity points down; F spring points up.
Learn more about forces at: https://brainly.com/question/12970081
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