Forces and speed Flashcards
What’s the definition of a push or pull force?
A force exerted to move an object away or towards another object.
What’s the definition of friction?
The force between two surfaces sliding over one another, that causes them to heat up and wear.
What’s the definition of weight?
The force that pulls objects towards the centre of the Earth .
What’s the definition of air resistance/drag?
A force acting against any object that is moving through the Earth’s atmosphere.
What’s the definition of lift?
A force pushing upwards on an object flying in the air.
What’s the definition of upthrust?
A force pushing upwards on an object in a liquid.
What is the definition of thrust?
A push caused by an engine.
What’s the difference between weight and mass in science?
Weight is a force! It measures the effect gravity is having on an object, it is measured in newtons. We can measure weight using a newton meter.
Mass is different from weight! Mass is a measurement of how much of something there is, it is measured in kilograms. In science we find the mass of something using a ‘mass pan balance’
Forces
Forces are either pushes or pulls. They are known as vector quantities which means they have a size and direction.
