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A force is a push or a pull that acts on an object due to the interaction with another object. Force is measured in newtons (N). There are two main categories of forces - contact forces close ...
- Pushes and pulls
A heavier car will need a bigger push to make it move as far...
- Forces, Pressure and Speed
A force can be a push or a pull. When a force is exerted on...
- Pushes and pulls
A heavier car will need a bigger push to make it move as far as a lighter toy car. The balloon is light so it only needs a small push force to make it move. We can use a force like pushing or ...
A force can be a push or a pull. When a force is exerted on an object it can change the object's speed, direction of movement or shape. Pressure is a measure of how much force is acting upon an ...
Force can be represented by vectors or expressed as a multiple of a standard force. The push or pull on an object can vary considerably in either magnitude or direction. For example, a cannon exerts a strong force on a cannonball that is launched into the air. In contrast, Earth exerts only a tiny downward pull on a flea.
- What Are Forces?
- How Many Forces?
- Forces and Movement
- Turning Forces
- Sticking Forces
- Forces That Change Shape
Kick a ball and it'll fly up into the air beforefalling back down to the ground. That's an example of everydayforces. What exactly is a force? Kicking a ball involves you applying a force (a push with your foot)that makes it fly upward. But once it's shooting through the air, theinvisible force of gravitypulls it back down to Earth—and that's adiff...
When we're looking at how things work or move, wetry to identify the force that's responsible. So when a flying ballzooms to the ground, we say "Aha! That's the force of gravity."But it's very rare to find only one force acting on something. Mostof the time, there are several different forces working at once, allpulling or pushing with different st...
When a force acts on an object, it often makes itmove faster or in a different direction. Once something is moving,you don't need a force to keep it moving: it will carry on moving allby itself unless another force stops it. When a rocketblasts intospace, you need a force to make it lift off to begin with and toovercome the force of Earth's gravity...
It takes a force to make something move in adifferent way, and that includes changing the direction in whichsomething is moving even if its speed stays the same. If you want tomake something go round in a circle, you have to apply a force tomake it turn and keep on applying that force to keep it turning. Thatmakes sense: something moving in a circl...
Forces make things move—but they also bringmoving things to a halt. Roll a toy car over a rug and it'll quicklycome to a standstill. The force of frictionsteals the car'senergy and slows it down. Friction is the force between two differentobjects that are in contact, either when they're locked together andtouching or when one of them slides past th...
Have you ever tried tugging the aluminum ring-pull of adrinks can and found it suddenly snaps off in your hand? What you'retrying to do is use a force to make the ring-pull move and changedirection at the same time. But instead of doing what you expect, onepart of the ring-pull snaps away from the other. This is an exampleof how forces can change a...
A force is a push or pull acting upon an object as a result of its interaction with another object. There are a variety of types of forces. Previously in this lesson, a variety of force types were placed into two broad category headings on the basis of whether the force resulted from the contact or non-contact of the two interacting objects.
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The Meaning of Force. A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.
