Finding lap time

  • Thread starter Mushroom79
  • Start date
  • #1
Mushroom79
26
0

Homework Statement



Friction=0.8
r=50 m
T=?

Homework Equations



T=distance/speed

Perimeter=2*pi*r

Fc=(mv^2)/r

Ffriction=m*g*friction

The Attempt at a Solution



Perimeter
2*3.14*50=314

Fc=Ffriction

(mv^2)/r=m*g*friction

v=r*g*friction

= 50*9.82*0.8=391.8

T=314/391.8 = 0.8 s

Is this correct? Seems a bit wrong to me :S
 
Last edited:

Answers and Replies

  • #2
andrien
1,024
32
forgot to take the square root of velocity.
 
  • #3
Mushroom79
26
0
forgot to take the square root of velocity.

Ah! That gives me almost 16 sec, which makes more sense

Thank you!
 

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