GCSE Physics paper 2 missed questions
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7 Terms
What is a force?
A push or pull on an object caused by it interacting with something
Give two effects that the gravity of a really big mass has on objects in its gravitational field
It makes objects fall towards the mass
Gives the objects a weight
What are four differences between weight and mass?
Weight is a force, mass isn’t
Weight is measured in newtons, mass in kilograms
Weight is measured using a calibrated swing whereas mass is using a mass balance
Weight depends on an object’s location, mass doesn’t
Define the centre of mass of an object
The point where an objects mass can be considered concentrated.
What is a resultant force?
A single force with the same effect as all forces acting on a single point
How do submarines use upthrust?
They fill tanks with water or air to make their weight more or less than the upthrust acting on them
Why does an object get hotter when pushed along a rough surface? [2]
Work is done against frictional forces and some is transferred to thermal energy stores.
