(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

You dive straight down into a pool of water. You hit the water with a speed of 7.0m/s, and your mass is 65kg.

Assuming a drag force of the form Fd=(-1.40x10^4)v, how long does it take you to reach 2% of your original speed? (Ignore any effects of buoyancy.)

2. Relevant equations

Fd=(-1.40x10^4)v

Fg=mg

Fnet=ma

a=(vf-vi)/t

3. The attempt at a solution

Fnet=mg-(-1.40x10^4)v

a =(mg-(-1.40x10^4)v)/m

a = -1500= vf-vi/t=0.14-7/t

t= -6.86/-1500

t= o.oo46s

When I enter this number or 4.6x10^-3, says it is wrong?? could someone help me, thisi s really frustrating me. The physics all seems to make sense to me.

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# Homework Help: Diving is a Drag

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