Atruck is moving around a circular curve at a uniform velocity of 13 m/s. if the centripetal force on the truck is 3,300 n and the mass of the truck is 1,600 kg, what's the radius of the curve? a. 6.30 m b. 81.94 m c. 109.09 m d. 348.56 m

Option B.

Since here the truck is moving on a circular track, it will experience centripetal force.

F(centripetal) = m × acc 
or 


where r is the radius of the track. 
m is the mass of truck
v is the speed  of the truck. 
Given: v = 13 m/s
m = 1,600 kg
F = 3300 Newton

To find = radius of track=?


r = 81.94 m
Therefore, radius of track is 81.94 m

Independent variable is something that is changed in a experiment. 

Are there options for this?