Question

II. Define/Explain the following.
1. Force
3. Contact forces
2. Non-contact forces
4. Fluid friction
Plz and the key words. Don't give long answers.​

Answer 1

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✳ Define/Explain the following.

1. Force

2. Contact forces

3. Non-contact forces

4. Fluid friction

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=> To define the following :-

• Force :- Push or pull of an object is considered a force. Push and pull come from the objects interacting with one another.

1. In SI base units: kg·m/s2.
2. F = m a

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• Contact forces :- Contact force is a force that is applied by objects in contact with each other. Contact force acts on a point of direct contact between the two objects. This force can either be continuous as a continuous force or can be momentary in the form of an impulse.

It is of three types :-

1. Frictional Force
2. Applied Force
3. Normal Force

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• Non-contact forces :- A non-contact force is a force applied on an object by another body without being in direct contact with the object.

Examples:-

1. Gravitational force
2. Gravitational forceElectromagnetic force
3. Gravitational forceElectromagnetic forceStrong Nuclear force
4. Gravitational forceElectromagnetic forceStrong Nuclear forceWeak Nuclear force

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• Fluid friction :- Fluid friction is the resistance to an object's motion through a liquid or gas. When the motion is occurring in a liquid, it is referred to as viscous resistance.

As an example, when an object falls through water, its speed reduces due to fluid friction acting on it.

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Hope it help you ☺

Answer 2

Explanation:

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