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KS3 Science - Forces
Terms in this set (56)
The force on an object moving through the air that causes it to slow down (also known as drag)
Forces acting on an object that are the same size but act in opposite directions.
To squash into a smaller space.
To change shape
The force acting on an object moving through air or water that causes it to slow down
The point beyond which a spring will not return to its original length when the force is removed.
The force acting between two charged objects
The amount by which an object gets longer when a force is applied
A region where something feels a force
A force that resists movement because of contact between surfaces
A non-contact force that acts between two masses
A law that says that if you double the force on an object the extension will double.
A substance that reduces friction between surfaces when they rub together
The force between two magnets, or a magnet and a magnetic material.
The amount of matter (stuff) a thing is made up of.
The unit of force, symbol N
A piece of equipment used to measure weight in newtons
A magnetic, electrostatic, or gravitational force that acts between objects not in contact.
Any force that acts to slow down a moving object
A support force provided by a solid surface like a floor
An object can be stretched if you exert a force on it
A stretching force
Opposing forces on an object that are unequal
The force on an object in a liquid or gas that pushes up
A force that needs to touch an object before it can affect it (e.g. friction).
The scientific unit for mass. 1 kg = 1000 g.
The amount of force with which gravity pulls something towards the Earth.
Gravitational Field Strength
The strength of the force of gravity on an object. The force of gravity per unit mass (the force of gravity on a 1 kg mass). On Earth 10 N/kg.
A non-contact force that attracts objects made out of certain materials.
The force that causes something to move forward - e.g. from an engine.
A force upwards from a surface when something pushes down on it.
Two forces that are the same strength and working in opposite directions.
The overall effect of all the forces on an object.
Not moving, still.
Any force which resists or acts against the motion of an object.
A force that acts to slow things down as they move through water.
Another name for air resistance and water resistance.
Something that has a smooth shape to reduce drag.
The space that an object takes up. Measured in m3 or cm3.
A measure of mass per unit volume of a substance. Measured in kg/m3 or g/cm3.
The force per unit area applied to a surface.
A unit of pressure. Other units include N/m2 and N/cm2.
Area of the surface of an object.
A simple machine that can increase the size of a force, or increase the distance the force moves.
A force put on something, especially a lever.
A point about which something turns.
The weight or force on something.
A lever where the load moves further than the effort.
A lever where the load is bigger than the effort.
A graph with distance plotted on the y-axis and time plotted on the x-axis.
On average, how fast an object is travelling. It is the total distance divided by the total time.
The speed of an object in a given direction.
The speed of an object compared to another object.
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