Not sure how to get started on on prob

  • Thread starter cowgiljl
  • Start date
  • #1
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A truck weighs 6000 lb. The truck is going around a curvewith a radius of 650 feet. The maximum friction force the road can exert on the tires is 1125 lb. it wants me to calculate the velocity in ft/sec

I am sorta lost on this an y help would be great

thanks
 

Answers and Replies

  • #2
1,036
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Think about centripetal acceleration & centripetal force.

What is needed to keep the truck moving along that curve, and what can the road provide?
 
  • #3
63
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still having problems

right now the only thing I know what to do is I converted the items that are in pounds to Kg. and feet to m

struggling
 
  • #4
OK, centripetal acceleration is given by v^2/r.

And by Newton's second law, we know that F=ma. Since the car is moving in a circular path, he is accelerating. The only force that is pointing towards the center of the circle is friction. So:
F=ma
Force of friction = m*(v^2/r)
1125lb = 6000lb*(v^2/650ft)
v=11.039701082909808568455053408699 ft/s
 
  • #5
63
1
x

thanks alot i have been trying to catch up on all the homewok and study for my physics final

thanks again
 

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