Chapter #3 (Forces and Motion) Flashcards
What is the definition of gravity?
The force of attraction that exists between any two objects with mass.
What is weight measured in?
Newtons (N)
Does every object falls with the same acceleration close to the earths surface?
Yes
What force does the earth pull with each kg of matter?
10N or more accurately 9.8N
What is the weight of an object of a mass of 1kg?
9.8 N aprox. 10N
How do you calculate weight?
W=m x g
What is the acceleration of free fall on earth?
9.8N
10N
What is the symbol for the acceleration of free fall?
g
What is the definition of force?
The action of one body on a second body; unbalanced force causes changes in speed, shape, or direction.
What are the types of contact force? (4)
Friction
Upthrust
Air resistance
Thrust
Tension
Reaction
What are the types of non-contact forces?
Weight
Magnetism
Static electrical force
What is the meaning of newton (N)
The force required to give a mass of 1kg an acceleration of 1m/s2
What is air resistance?
Friction acting on an object moving through the air.
What is friction?
The force that acts when two surfaces rub over one another.
What is acceleration of free fall/acceleration due to gravity?
The acceleration of an object falling freely under gravity.
