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A force results from the interaction between two objects. A force can be defined as a push or a pull which acts upon an object as a result of its interaction with another object.
When two objects interact, the forces they exert on one another are equal and opposite. These forces are referred to as the action and reaction forces.

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Pushing and Pulling - Force, Work and Energy

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Pushing a car up a hill.

Kicking a ball.

Pushing a desk across a room

using a screwdriver

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A contact force is any force that requires contact to occur.
Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter.

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Gravitational force.

Magnetic force.

Electrostatics.

Nuclear force.

Part one

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What are NON-CONTACT Forces? - Part 1 | Physics | Don't Memorise

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The most familiar example of a non-contact force is weight. In contrast a contact force is a force applied to a body by another body that is in contact with it. However it is to be noted that the origin of all contact forces (such as friction) can be traced to non-contact forces.

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The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction. Since any change in velocity is considered acceleration, it can be said that a force on an object results in the acceleration of an object.
The push can come from direct contact, like when objects collide or from a force field like magnetism. The pull seems to only come from a field at a distance, like gravity or magnetism. Dragging can occur when sliding an object over the surface of another.

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To begin, fill the bottle with rice. Try sticking the chopstick down into the bottle. When you grab the chopstick and pull up, what happens? The stick should just come right out.
How do you make the rice stick to the chopstick so you can just pick it up? You've got to add more friction. Here's how: Put the lid on the bottle and tap the bottom of the bottle on a hard surface. Do this a few times to compact the rice and get rid of the air pockets. Now you should have room to add a bit more rice to the bottle.
Once you've added a bit more rice, stick the chopstick back into the bottle. This time, when you pull up on the chopstick, you should be able to pick up the whole bottle.
If it still doesn't stick, try tapping the bottom again. You may have to add more rice as well. Sometimes letting the rice settle for about an hour will help if it doesn't seem to be working.

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Physics - What are NON-CONTACT forces? (Part 2)

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Force is all about interaction between objects. When two objects interact, each object applies force onto the other. But how do the objects interact? Are there different kinds of interaction? Watch this video to know more. To view the entire course for free, visit our website here: https://dontmemorise.com/course/index.php?categoryid=52 Don't Memorise brings learning to life through its captivating FREE educational videos.