Acertain light truck can go around a flat curve having a radius of 150 m with a maximum spee dof 32.0 m/s. with what maximum speed can it go around a curve having a radius of 75.0 m?

Answer

Maximum speed at 75 m radius will be 22.625 m /sec

Explanation:              

We have given radius of the curve r = 150 m

Maximum speed

Coefficient of friction

Now new radius r = 75 m

So maximum speed at new radius

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray