Terminal velocity

why will an object with no force slow down and stop?

due to friction

what does friction act opposite to?

direction of movement

how do you travel at steady speed?

balance frictional forces

what is drag?

this is the resistance you get in a fluid

how do you reduce drag?

keeping the shape of an object streamlined, allows fluid to flow easily across it

how does objects in a fluid reach terminal velocity?

• object sets off, force of gravity much more than frictional force slowing it down

• accelerates

• as speed increases friction builds up

• reduces acceleration and eventually frictional force is equal

• resultant force is zero

• reached terminal velocity

what does the frictional force in terminal velocity depend on?

shape and area

In terms of a human skydiver, why would not having a parachute be bad?

has small area and force of w=mg pulling him down

why is it good to have the parachute open

• more air resistance

• still same force of W=mg pulling him down

• terminal velocity decreases

• safe speed for skydiver to hit ground at