Term 3 Week 6 Study Flashcards
What are forces?
Forces are pushes, pulls or even twists. Forces are always acting upon anything, like the chair you are siting on. Even though it looks like nothing is happening forces are acting upon, but is it balanced
What are forces represented by?
Force arrows the direction they are pointing in that is the direction what the force is going in. The size of the arrow determines how powerful the force is.
How can forces act?
They can act using contact or non contact. Forces that touch are called contact forces such as Friction. While forces that don’t require contact are called non-contact forces such as Gravity.
What are some contact forces?
Thrust - Thrust is the scientific term for a force that makes an object move forward.
Upthrust - An object placed in a fluid such as water experiences a force upwards. This is upthrust or buoyancy force.
Air Resistance - Air Resistance results from an object passing through air. The air molecules take energy from the object to move out of its path.
Friction - Friction is a resisting force when two surfaces move whilst in contact.
Compression - Compression is a pushing force when one object squashes another one.
Tension - Tension is a pulling force through rope, string or chain.
What are some examples of non-contact forces?
Gravity - Gravity is a force that acts between all objects. But it is very weak so that is only noticed when one of the objects is very large, such as Earth, the moon or the sun. The force of gravity is sometimes referred as one objects weight.
Electrical Force - Electrical force comes from electric charges and attracts objects with the opposite charge or repel those with the same charge.
Magnetic Force - Magnetic Force comes from magnets where we see unlike poles attract and like poles repel each other. Some metals are attracted to metals.
