A go-cart travels around a flat, horizontal,

circular track with a radius of 25 meters. The

mass of the go-cart with the rider is

  1. kilograms. The magnitude of the maximum

centripetal force exerted by the track on the

go-cart is 1200. newtons.

Which change would increase the maximum

speed at which the go-cart could travel without

sliding off this track?

(1) Decrease the coefficient of friction between

the go-cart and the track.

(2) Decrease the radius of the track.

(3) Increase the radius of the track.

(4) Increase the mass of the go-cart.