Question

some examples of contact force and non-. force and write it's type​

Answer 1

Answer:

Contact force are Muscular Force and Frictional Force.

Non-contact forces are Gravitational Force, Electrostatic Force, Magnetic Force.

That's all I know. Hope it helped

Answer 2

Explanation:

What is Contact and Non Contact Force?

Contact and non contact forces have a difference in their basic nature, let’s discuss these:

A force acting between two bodies in contact is called a contact force. For example, while pushing a table towards the wall is the contact force, or you are pulling something upwards is also a contact force because there is a direct contact between you and the object you are pulling.

A non contact force acts between the bodies that are not in direct contact. For example, an apple fell on Newton because of an invisible force called gravity.

Definition of Contact Force

A force that acts only when there is physical contact between two bodies.

We learned about Newton’s second law of motion. It says that by applying force to the body of mass ‘m’, the body starts accelerating.

If the body is of mass ‘m’ and the acceleration it attains after being subjected to force is ‘a’, then the equation for the force becomes:

F = ma

However, one more thing happens is, when we apply force on the body, it gains momentum, so the rate of change of momentum is equal to the force applied. The equation for the same is as follows:

F=ΔpΔt

ΔpΔt

Where ΔpΔt

ΔpΔt

= change in momentum per unit time and its unit is kg-m/s.

Types of Contact Forces

Below is the list of the types of contact forces:

• Surface tension
• Air resistance
• Friction
• Upthrust or Buoyancy force
• Drag force
• Applied force
• Normal force
• Muscular force

Contact Force Examples

• Example 1:

Throw a football and it flies in the sky and then reaches the ground.

In this example, you can observe two types of forces.

Firstly, under the contact force of our kick, it makes a vertical motion, then executes a projectile motion, and now, under the effect the air resistance or simply friction, the ball slows down and eventually comes to rest, i.e., on the ground.

• Example 2:

Stretch the spring from its resting position, it will start oscillating from its mean position. However, after some time, under the effect of restoring force, the spring comes back to its original position.

Now, let’s take some contact force examples where you can definitely find the difference between contact and non contact force.

• Example 3:

You all love paragliding, bungee jumping, and much more adventurous activities. All these work under the effect of the contact force.

• Types of Non Contact Forces

Below is the list of non contact forces:

• Gravitational force
• Electromagnetic force (electric force + magnetic force)
• Nuclear force

Non Contact Force

• Example 1:

The electricity you get at your homes is because of an invisible force that acts on electrons running in the wires of your appliances. Do you know how it occurs?

A wire contains millions of electrons bearing random motion, the flow of these occurs because of the electric force.

• Example 2:

You might have heard of Coulomb’s law. The mutual electric force between two charges of the same magnitude but the opposite polarity is given by Coulomb’s law.

Example 3:

Let’s suppose that you wound a wire around the iron nail, on supplying the current, the magnetic field generates around it. Do you know why it happens? It happens because a wire contains millions of electrons making random motions when current flows through the wire, these random electrons align in the specified direction because of which magnetic field generates.

Now, under the effect of magnetic force, or the force of attraction, iron filings get attracted to the iron nail (or a magnet).

• Example 3:

During the rocket propulsion, a greater amount of force is applied to overcome the gravitational impact because gravity attracts everything towards itself. We can observe the effect of gravity in our solar system. All the planets revolve around the Sun under the gravity effect.

Hope It helped You

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