Forces and speed Flashcards
What is a force caused by an engine?
Thrust
What is the definition of friction?
The force between two surfaces sliding over one another, that causes them to heat up and wear
What is the force that pulls objects towards the centre of the Earth?
Weight
What is the definition of a push or a pull force?
A force exerted to move an object away or towards another object
What substance reduces friction between surfaces when they are rubbing together?
Lubrication
What is a contact force?
A force that acts when an object is in contact with a surface, air, or water. eg air resistance
What is a driving force?
The force that is pushing or pulling something.
What is the definition of mass?
The amount of matter (stuff) a thing is made out of
What is a newton and what is its symbol?
The unit of force, symbol N
What do you use to measure weight in newtons?
A newton meter
What is a non-contact force?
A magnetic, electrostatic, or gravitational force that acts between objects not in contact
What are balanced forces?
Forces acting on an object that are the same size but act in opposite directions
What’s the definition of reaction?
The support provided by a solid surface like a floor.
What are resistive forces?
Any forces that act to slow down a moving object
What are unbalanced forces?
Opposing forces on an object that are unequal
