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# How do you calculate terminal velocity ? watch

1. Hi I am asking this question twice because unfortunately I did not understand what the people who replied back on the original thread said so hopefully someone new could help me.

How do I calculate the terminal velocity of a sky divers if I know:

the mass of the skydiver
gravity of earth
drag coefficients
The resultant force

2. (Original post by Cinna21)
Hi I am asking this question twice because unfortunately I did not understand what the people who replied back on the original thread said so hopefully someone new could help me.

How do I calculate the terminal velocity of a sky divers if I know:

the mass of the skydiver
gravity of earth
drag coefficients
The resultant force

(as you probably know) Terminal velocity is the speed at which the resultant force is zero, i.e. drag is equal in magnitude to weight - because the body has stopped accelerating.

if this is a book question it seems odd that they'd give you drag coefficients in a question without any formula or rules of thumb that'd help you calculate a drag force.

if you've got 1 minutes data in a table maybe they expect you to extrapolate the velocity graphically rather than calculate it?
3. (Original post by Joinedup)
(as you probably know) Terminal velocity is the speed at which the resultant force is zero, i.e. drag is equal in magnitude to weight - because the body has stopped accelerating.

if this is a book question it seems odd that they'd give you drag coefficients in a question without any formula or rules of thumb that'd help you calculate a drag force.

if you've got 1 minutes data in a table maybe they expect you to extrapolate the velocity graphically rather than calculate it?
Yes its not a textbook question but I've solved it now and thank you for the help I didn't need to draw a graph but even if I did I would then have worked out the answers too so thank you
4. (Original post by Cinna21)
Yes its not a textbook question but I've solved it now and thank you for the help I didn't need to draw a graph but even if I did I would then have worked out the answers too so thank you
There is a equation for terminal velocity but im not sure if you need to know that much detail
5. (Original post by hasan6091)
There is a equation for terminal velocity but im not sure if you need to know that much detail
Nop I don't need to use that but thanks anyway

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