Please enable JavaScript.
Coggle requires JavaScript to display documents.
types of forces(science chpt 9.2) - Coggle Diagram
types of forces(science chpt 9.2)
non-contact forces
Gravitational force
It is the force that attracts two objects towards each other .When a planet exerts gravitational force on an object and pulls it to its centre, the object is known to have weight.
Magnetic force
It is the force exerted between a magnet and a another magnetic material such as iron and steel.Magnetic force also exists between magnets.
contact forces
friction
it is the force that opposes motion between two surfaces in contact.
elastic force
When an elastic material is stretched or compressed, it resists the change in shape by exerting a force in the opposite direction to return to its original shape
Weight
Weight is the measure of the gravitational force acting on an object.
Since weight is a type of force the SI unit for weight is newton (N)
Mass
Mass is the amount of matter in an object
The SI unit for of mass is Kilogram (KG)
We can measure forces by using a spring balance. The spring in a spring balance stretches when a force pulls it.The weight of an object can be read directly off the scale on the spring balance
It can also be used to measure the amount of force needed to pull an object. A greater force is needed to pull an object on a rough surface than on a smooth surface
The difference of weight and mass
weight
Weight referce to the amount of gravitational force exerted on a object
Weight may change with location
SI unit is newton (N)
Can be measured by a spring balance
Mass
Mass is the amount of matter in a object
Mass remains constant regardless of location
Mass can be measured by using a electronic balance,beam balance
The SI unit of mass is kilograms (KG)