Frictional Force and Terminal Velocity Flashcards
Friction is always there to…
Slow things down.
What happens when an object has no force propelling it along?
It will always slow down and stop because of friction.
Friction always acts in the opposite direction to what?
Movement.
To travel at a steady speed what happens to the driving force?
It needs to balance the frictional forces.
How do you get friction?
Between 2 surfaces in contact.
Object passes through a fluid.
What are most of the resistive forces caused by?
Air resistance and “drag”.
What is the most important factor in reducing drag in fluids?
Is keeping the shape of the object streamlined.
What is the opposite extreme?
Parachuting.
Highest drag you can get.
Drag increases as the…
Speed increases.
Frictional forces from ____ always ____ with ____.
Fluids.
Increase.
Speed.
A car has much more friction to work against when…
It is travelling at a faster speed.
What happens when a car is travelling faster?
Engine works much faster just to maintain steady speed.
When objects fall through fluids what do they reach?
Terminal velocity.
What happens to falling objects when they first set off?
Force of gravity is much more than frictional force slowing them down.
If the force of gravity is much more than the frictional force what happens to the object?
It will accelerate.
