Motion (Topic 2) Flashcards
What is friction?
It is the force that acts when one surface slides over another. It always opposes the motion. It converts kinetic energy to heat
What is static friction?
It occurs when the two surfaces are trying to slide over each other. It is greater than dynamic friction
What is dynamic friction?
Occurs when one of the surfaces is actually moving
What does proportional mean?
Quantities depend on one another. Two things have to be the same
What is Newton’s 1st law?
In the absence of a resultant force an object will remain at rest or continue to move at a constant velocity i.e. balanced forces do not produce acceleration
What is Newtons’s 2nd law?
The acceleration of an object is directly proportional to the resultant force acting on it and inversely proportional to the mass of the object. OR The rate of change of momentum of a body is proportional to and in the same direction as the resultant force acting on it
What is Newton’s 3rd law?
It body A exerts force on body B, there is an equal and opposite force exerted on A by B
What is the definition of 1 newton?
A resultant force of one newton will cause a mass of 1kg to accelerate at 1m/s2
What equation represents Newton’s 2nd law?
F = m X a
What is the relationship between acceleration and the resultant force?
Directly proportional
What is the relationship between acceleration and mass
Inversely proportional
Directly proportional definition
Related so that one becomes larger or smaller
Inversely proportional definition
As one quantity increases, the other automatically decreases
Resultant force definition?
The total amount of force acting on the object or body along with the direction of the body
