Forces and speed Flashcards
What is weight measured in?
newtons
What is mass measured in?
kilograms
Does weight change depending on the gravitational field of the planet?
yes
Does mass change depending on the gravitational of the planet?
no
What is an unbalanced force?
opposing forces on an object that are unequal
What is a balanced force?
forces acting on an object that are the same size but act in opposite directions
What is air resistance?
the force on an object moving through the air that causes it to slow down (drag)
What is a contact force?
a force acting on an object when it’s in contact with a surface, air or water
What is a drag force?
a force acting on an object when it’s moving through air or water
What is friction?
a force that resists movement because of contact between two surfaces
What is lubrication?
a substance that reduces friction between two surfaces when they rub together
What is mass?
the amount of matter (stuff) an object is made of
What is weight?
it measures the effect gravity is having on an object
What is a non-contact force?
a force that acts between objects that are not in contact
What is upthrust?
upward force experienced by an object immersed in a liquid
