Force, friction and air resistance Flashcards
Write the equation for force
Force = Mass x Acceleration (F=Ma)
Define force
A push or pull that alters the state of motion of a body
What is force measured in
Newtons
What 5 things can force do
Create motion, accelerate a body, decelerate a body, change the direction of a body, change the shape of a body
Define net force
Overall force acting on a body when all individual forces have been considered
Define balanced forces
When two or more forces acting on a body are equal in size – Net Force is ZERO
Define an unbalanced force
When forces acting on a body are unequal in size. – Resulting in Net Force
What are two vertical forces
Weight and reaction force
What are two horizontal forces
Friction and air resistance
Define weight
Gravitational force that the Earth exacts on the body (Downwards).
Define reaction
Whenever there is a point of contact between two bodies, there will always be a reactionary force
Define air resistance
This is the force that opposes motion of a body travelling through the air
Define friction
The force that acts in opposition to the movement
between two surfaces in contact
How can friction be affected
Roughness or smoothness of footwear or object in contact with the ground. Roughness or smoothness of the ground or court. Size of the down force. Temp of surface
What factors affect air resistance
Shape of an object, speed/velocity of release, frontal cross - sectional area, smoothness of surface
