Exam 93: Braking System Principles

All of the following are types of brake fade EXCEPT ________.

What factors determine the friction coefficient?

Work is the transfer of energy from one physical system to another.

It takes 50 pounds of force to move a 100 pound block of wood across the floor. The coefficient of friction is ________.

A 3000 pound vehicle is calculated to have a kinetic energy of 90,000 ft-lb at 28 mph. If the speed of the vehicle remains the same and the weight is doubled to 6000 pounds, what will happen to the calculated kinetic energy?

Technician A says that the front brakes do most of the braking because the front brakes are larger. Technician B says that due to weight transfer, most of the braking force needs to be done by the front brakes. Which technician is correct?

Mechanical advantage is the ratio of force applied to the energy exerted.

The front brakes on a vehicle do more work than do the rear brakes. Technician A says that this is because the front wheel cylinders are closer to the master cylinder than are the rear wheel cylinders. Technician B says that this is because the weight of a vehicle shifts to the front during a stop. Which technician is correct?

Rear brakes do less work during hard braking than the front brakes because ________.

The friction between two surfaces is affected by all of these EXCEPT ________.

A typical hanging brake pedal is a ________.

Energy is a measure of work.

The brake pedal assembly uses a mechanical lever to ________.

If the weight of a car doubles, its kinetic energy ________.

Leverage is a mechanical principle used to increase force.

All of the following are correct statements about braking EXCEPT ________.

Maximum deceleration rates for a typical passenger car or light truck is ________.

A body in motion tends to remain in motion in a straight line unless acted upon by an outside force.

The static friction coefficient is always higher than the kinetic friction coefficient.

Weight transfer during braking is caused by ________.