Driver's Ed ch. 5

____ is the force that pulls vehicles toward the earth

• gravity

• friction

• traction

The gripping action that keeps tires from slipping is ___

• friction

• blowout

• thread

A restraint device, such as an air bag, that works automatically and the occupant does not need to fasten a

• passive restraint device

• thread

• banked curve

___ is the friction which allows tires to grip the roadway

• traction

• force of impact

• blowout

The grooved surface of a tire, called __, grips the roadway

• thread

• energy of motion

• gravity

A safety belt that a vehicle's occupant must adjust is an

• active restraint device

• center of gravity

• blowout

A curve that is higher on the outside is a

• banked curve

• force of impact

• traction

The __ is the force with which one moving object hits another object

• force of impact

• restraint device

• friction

A bald tire might result is a ___, which is a sudden loss of air pressure in the tire

• blowout

• thread

• gravity

Wen an object moves, it uses kinetic energy, which is called ___

• energy of motion

• passive restraint device

• force of impact