Topic 5 Terminal Velocity - (look At Book From School Flashcards
What will a force always slow down and stop due to
Friction unless you’re in space
What direction does friction always act in
In the opposite direction to the movement
What is needed to happen to the frictional forces to drive at a steady speed
The driving force needs to balance the frictional forces
When do you get friction
Between two surfaces in contact or when an object passes through a fluid (drag)
When does drag increase
When speed increases
What is air resistance
A type of drag
What is drag
The resistance you get in a fluid
What reduces drag/ air resistance
Streamlined objects
What do parachutes do
Increase draf
What do frictional forces from fluids increase with
With speed
What happens when an object starts falling
The force of gravity is much more than the frictional force slowing so it accelerates
What happens as speed of an object falling increases
Friction builds up and gradually reduces the acceleration u til eventually the frictional force is equal to the accelerating force so the resultant fire is 0
What is the maximum speed and terminal velocity
When the frictional force is equal to the accelerating force
What is the terminal velocity of an object determined by
The drag in comparison to its weight
What does the frictional force of an object depend on
Shape and area
