Chapter 9.2 - What are the types of forces? Flashcards
what is contact force?
Forces acting between two objects that are in physical contact with each other
what is non-contact force?
Forces acting between two objects that are not touching each other
what is friction?
Friction is the force that opposes motion between two surfaces in contact. It is the force that allows us to hold on to things without
dropping them.
what happens when an elastic material is streteched or compressed?
it resists the change in shape by exerting a force in the opposite direction
what is elastic force?
Elastic force is the force acting on a stretched or compressed elastic object to return it to its original shape
what is gravitational force?
Gravitational force is a force that attracts two objects towards each other. When a planet exerts gravitational force on an object and pulls it towards its centre, the object is known to have weight.
what is magnetic 🧲 force ?
It is the force exerted between a magnet and another magnetic material such as iron or steel.
Magnetic force also exists between two magnets.
what does every magnetic material have?
A North and a South Pole
what happens when unlike poles are brought close to each other?
they pull together due to the magnetic force of attraction.
what happens when like poles are brought close to each other ?
they push apart due to the magnetic force of repulsion.
what is weight?
Weight is the measure of the gravitational force acting on an object.
what is the SI unit of weight?
Newton (N)
What is the SI unit for mass?
Kilogram (kg)
how do we measure forces using with a spring balance?
The spring in a spring balance stretches when a force pulls on it. The weight of an obiect can be read directly oft the scale on the spring balance
What is Mass?
The amount of matter in an object
