An eighteen wheeler weighing 40 tons is traveling down the highway with a speed of 80.0 mi/hr. The driver sees an accident 0.10 miles ahead and slams on the brakes. What is the minimum friction force that the tires can supply,

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

If steel is more dense that lake water, why can a boat float