Podcast
Questions and Answers
What is the force that pulls objects toward the center of the earth?
What is the force that pulls objects toward the center of the earth?
Gravity
A vehicle's speed when going downhill tends to?
A vehicle's speed when going downhill tends to?
Increase
Energy of motion is another way of expressing?
Energy of motion is another way of expressing?
Kinetic energy
When a vehicle's speed doubles, it needs about how many times the distance to stop?
When a vehicle's speed doubles, it needs about how many times the distance to stop?
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What is the gripping action that keeps a tire from slipping on the roadway called?
What is the gripping action that keeps a tire from slipping on the roadway called?
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When braking and turning, you use?
When braking and turning, you use?
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If a tire is under-inflated, what part grips the road well?
If a tire is under-inflated, what part grips the road well?
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What does all-wheel drive mean?
What does all-wheel drive mean?
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Good shock absorbers help create?
Good shock absorbers help create?
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In wet weather, with temperatures near freezing, which freezes first?
In wet weather, with temperatures near freezing, which freezes first?
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A vehicle driven into a curve tends to?
A vehicle driven into a curve tends to?
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If you drive through a curve at a speed higher than the posted speed, your vehicle needs?
If you drive through a curve at a speed higher than the posted speed, your vehicle needs?
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What is a banked curve?
What is a banked curve?
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Large vehicles such as trucks and buses have?
Large vehicles such as trucks and buses have?
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What statement best describes reaction time?
What statement best describes reaction time?
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The distance a vehicle travels from the time the driver applies the brakes until the vehicle stops is called?
The distance a vehicle travels from the time the driver applies the brakes until the vehicle stops is called?
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What rule is used to estimate your total stopping distance under ideal conditions?
What rule is used to estimate your total stopping distance under ideal conditions?
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Three factors that determine the force of impact are?
Three factors that determine the force of impact are?
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How many collisions occur when a vehicle hits a solid object?
How many collisions occur when a vehicle hits a solid object?
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What type of restraint provides protection without having to be handled by the occupant?
What type of restraint provides protection without having to be handled by the occupant?
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A properly adjusted safety belt fits?
A properly adjusted safety belt fits?
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Airbags are designed to?
Airbags are designed to?
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What does an airbag do?
What does an airbag do?
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Which energy-absorbing feature protects the driver in a front-end collision?
Which energy-absorbing feature protects the driver in a front-end collision?
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A properly installed child safety seat is?
A properly installed child safety seat is?
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Study Notes
Gravity and Motion
- Gravity is the force that pulls objects toward the Earth's center.
- A vehicle's speed increases when going downhill.
- Kinetic energy refers to the energy of motion.
- When a vehicle's speed doubles, it requires approximately four times the stopping distance.
Traction and Tires
- Friction is the gripping action that prevents tire slipping on the roadway.
- Split traction occurs when braking and turning simultaneously.
- An under-inflated tire primarily grips the road with its outer edges.
Vehicle Dynamics
- All-wheel drive means power is delivered to all four wheels.
- Good shock absorbers enhance traction.
- In wet conditions near freezing temperatures, bridges freeze before roadways.
Handling Curves
- A vehicle tends to travel in a straight line when entering a curve.
- Exceeding the posted speed limit on a curve increases the need for traction to maintain stability.
- A banked curve is engineered to be higher on the outside than on the inside.
Vehicle Stopping and Reaction
- Large vehicles, like trucks and buses, have reduced stopping ability.
- Reaction time lengthens with more complex traffic situations.
- Braking distance is the distance traveled from the moment brakes are applied until the vehicle stops.
Stopping Distance and Impact
- The 4-second rule estimates total stopping distance under ideal conditions.
- The force of impact depends on speed, weight, and the distance between impact and stopping.
- Two collisions occur when a vehicle strikes a solid object: one internal and one external.
Safety Restraints
- A passive restraint provides protection without occupant interaction, such as air bags.
- Properly adjusted safety belts fit snugly across the hips and comfortably across the chest.
- Air bags are designed to work in conjunction with seat belts and automatically inflate during a collision.
- The steering wheel and column serve as energy-absorbing features to protect drivers in front-end collisions.
- Child safety seats are mandated in all states for children up to a certain age.
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Description
Test your knowledge about key concepts in Chapter 9 of Drivers Ed. This set includes important terms and definitions related to forces, motion, and energy in driving. Perfect for reinforcing your understanding as you prepare for your driving test.
