Forces Flashcards
What is a Newton Meter?
A piece of equipment used to measure weight in newtons.
What is a force?
A push or a pull.
What is tension?
A stretching force
What is weight?
The force that pulls objects towards the centre of the Earth
What is thrust?
A push caused by an engine.
What is friction?
The force between two surfaces sliding over one another, that causes them to heat up and wear.
What is a contact force?
A force that acts when an object is in contact with a surface, air or water.
What is gravity?
A non-contact force that acts between two masses.
Unbalanced forces means ….
Opposing forces on an object that are unequal/ not in equilibrium.
Density means …
The amount of particles within a certain volume.
Hooke’s Law states that …
The force on an object is directly proportional to its extension.
Mass is …
The amount of matter an object is made up of.
The unit of weight is ..
Newtons(N)
The unit of mass is …
kilograms(kg), grams(g), tonnes
Air resistance is …
The force on an object moving through the air that causes it to slow down (also known as drag).
Water resistance is …
The force on an object moving through water that causes it to slow down (also known as drag).
Extension means …
The amount by which an object gets longer when a force is applied.
The unit for density is …
g/cm³
A streamlined object is one that …
Is shaped to reduce resistance to motion from water to air.
What is the Earth’s gravitational field strength?
9.8 N/kg
What is lift?
A force pushing upwards on an object flying in the air.
What is upthrust?
A force pushing upwards on an object in a liquid.
True or false: Mass is a force.
False - Weight is a force, not mass
True or false: Mass does not depend on the gravitational field strength.
True
True or false: An object floats if it has a greater density than the liquid it is in.
False - it would sink.
True or false: Air resistance is a type of friction.
True
True or false: Weight does not depend on the gravitational field strength.
False
