# What does F0 represent?

#### emily081715

1. Homework Statement

A burst of compressed air pushes a pellet out of a blowpipe. The force exerted by the air on the pellet is given by F(t)=F0e(−t/τ), where τ is called a time constant because it has units of time.

What does F0 represent?

2. Homework Equations
F0 represents the maximum force.
F0 represents the minimum force.
F0 represents the average force.
F0 represents the force at time t = 0.

3. The Attempt at a Solution
i can check as many that apply, i originally though it was the force at t=0 because that would mean it's the inital values. that wasn't right. can someone help

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#### CWatters

Homework Helper
Gold Member
i originally though it was the force at t=0
It is equal to the force at t=0 but there is a (very slightly) better answer.

What happens to the term e-t/τ as t increases?

#### emily081715

It is equal to the force at t=0 but there is a (very slightly) better answer.

What happens to the term e-t/τ as t increases?
would the better answer be that it's the minimum value

#### emily081715

would the better answer be that it's the minimum value
because that's not the only answer if it's correct. i'm on my last attempt for the question and need to figure this out

#### CWatters

Homework Helper
Gold Member
It's not the minimum.

#### CWatters

Homework Helper
Gold Member
As t increases so e-t/τ decreases. So at t=0 the value of F(t) is a maximum.

#### CWatters

Homework Helper
Gold Member
I just noticed this bit..

i can check as many that apply
Ok so there are two answers that apply.

#### emily081715

As t increases so e-t/τ decreases. So at t=0 the value of F(t) is a maximum.
yes i need to check all that apply. so Fo is a maximum value and Fo is t=0 ?

Homework Helper
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#### emily081715

Are those the only two?

Homework Helper
Gold Member

Thank you

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