DR 9

The force that pulls objects toward the center of the earth is

• gravity

• energy

• inertia

• kinetic energy

A vehicle's speed when going downhill tends to

• decrease

• stabilize

• increase

• inhibit

Energy of motion is another way of expressing

• kinetic energy

• effect of wind on vehicle control

• mileage rating of a vehicle

• the way vehicle bodies are designed

Because of its energy of motion, when a vehicle's speed doubles, the vehicle needs about

• twice the distance to stop

• half the distance to stop

• one-fourth the distance to stop

• four times the distance to stop

The gripping action that keeps a tire from slipping on the roadway is called

• kinetic energy

• traction

• gravity

• inertia

When braking and turning, you use

• all four wheels of traction

• only the outside edge of your tires

• changing traction forces

• additional traction

If a tire is underinflated, the only part that grips the road well is the

• center of the tire tread

• outside edges of the tire tread

• tire cords

• wear bars

All-wheel drive means

• power is supplied to four wheels

• all four tires are inflated properly

• your traction is reduced

• power is in the front tires only

Good shock absorbers

• last for the life of the vehicle

• are necessary only on traction vehicles

• decrease available traction

• help create traction

In wet weather, with temperatures near the freezing point,

• a highway roadway freezes before a bridge roadway

• a bridge roadway freezes before a highway roadway

• bridge and highway roadways will freeze at the same time

• bridge and highway roadways will not freeze