Quick physics problem

[us3rnotfound]

Say a jumper has a mass of 70 kg, and he jumps off 100 meter bridge into water or earth or whatever. How far would it seem the jumper would be away from the bridge after 2.5 seconds? I got 55 meters, just seeing if this *seemed* feasible to you.

BTW, this was with considering drag force. You don't have to solve it, just tell me if this might be close.

 

[Heisenberg]

You're trying to find the horizontal distance he's away from the point he jumped off the bridge?

 

[us3rnotfound]

its a straight drop, free fall. im finding the distance he's traveled so far at t = 2.5 seconds.

 

[Heisenberg]

Oh, then ignoring drag it's just d=0.5*g*t^2, assuming the bridge is at d=0. You'll then need to put in whatever functional form for the drag force you're using.

Edit: With your numbers, I got 30.63m w/o drag, so 55m seems too much.

 

[dullard]

55 m does not seem feasible unless he was upside down and used his legs to propel him faster downward than gravity would normally do (if that is even possible). Cut that distance in half and it would seem quite feasible with drag.

 

[TomKazansky]

acceleration of the gravity = 9.8m/s^2. The jumper's weight does not matter in this problem.

Assuming no drag, x = 1/2at^2. so 1/2(9.8)(2.5)^2 = 30.625m~30.63m.

Heisenberg is correct.