1823786
Description
Flashcards by mimiblue890, updated more than 1 year ago
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Created by mimiblue890
almost 10 years ago
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| Question | Answer |
| WHAT ARE THE FORMULAS FOR DISTANCE SPEED AND TIME? | Average speed= distance -------------- time |
| WHAT IS THE FORMULA FOR ACCELERATION? | |
| FORMULA FOR FORCE? | Mass x Acceleration |
| WHAT 4 THINGS EFFECT REACTION TIME? | -Tiredness -Alcohol or other drugs -travelling fast -distraction or lack of ceoncentration |
| WHAT THREE FACTORS WILL BREAKING DISTANCE TO INCREASE? | -Poor road conditions(e.g. icy) -Car not properly maintained(e.g. worn brakes) -A high speed |
| TO PREVENT ACCIDENTS, WHAT THREE FACTORS ARE USED TO MAINTAIN SAFE STOPPING? | -Keep appropriate distance from car in front -different speed limits for different types of roads -slow down when road conditions are poor |
| FORMULA FOR WORK DONE? | Work done= force x distance moved |
| WHAT IS THE FORMULA FOR WEIGHT? | Weight= mass x gravitational field strength |
| HOW MANY NEWTONS OF FORCE ARE THERE ON EARTH PER 1KG? | 10N |
| FORMULA FOR POWER? | Power= Work done ------------------ Time taken |
| FORMULA FOR KINETIC ENERGY? | 2 Kinetic energy= 1 x m x v ---- 2 |
| HOW CAN FORCE BE REDUCED BY ACCELERATION? | -Increasing stopping or collision time -increasing stopping or collision distance |
| WHAT 4 FEATURES DOES A CAR HAVE THAT ABSORBS ENERGY WHEN IT STOPS SUDDENLY? | -Brakes get hot -CRUMPLE ZONES that change shape -SEAT BELTS that stretch a little -airbags that inflate and squash |
| WHAT IS A CRUMPLE ZONE? | Areas of a car that absorb energy of a crash to protect the center or the vehicle |
| HOW DO YOU FIND THE KINETIC ENERGY LOST? | Kinetic energy lost= WORK DONE by the breaks |
| WHY DO SOME PEOPLE NOT WEAR SEAT BELTS? | -There is a risk of chest injury -they may be trapped in an event of a fire -drivers may be encouraged to drive less carefully because they know they have protection from the seat belt |
| FORMULA FOR MOMENTUM? | Momentum= mass x velocity |
| WHAT TWO THINGS DOES THE AIR RESISTANCE FORCE DEPEND ON? | -The area (the larger the area, the greater the air resistance) -speed (the faster the object falls, the greater the air resistance |
| HOW DO YOU WORK OUT THE STOPPING DISTANCE? | Stopping distance= thinking distance + braking distance |
| HOW DO YOU WORK OUT THINKING DISTANCE? | Thinking distance= speed x reaction time |
| DISADVANTAGES OF USING FOSSIL FUELS? | -Non-renewable source -produces green house gas pollution (co2) -acid rain produced by pollutants |
| ADVANTAGES OF BIO FUEL OR SOLAR POWERED VEHICLES? | -Does not produce pollution when being driven -Improving air quality in towns and cities -quiet -If the electricity used to recharge it is renewable (wind or solar) then it would be non polluting at all |
| DISADVANTAGES OF BIO FUELED CARS? | -It is often charged using a non renewable source of electricity so it still affects the environment -Takes a lot longer to charge that fossil fueled cars |
| Weight, Friction, reaction(support) and Power/Thrust | |
| HOW DO YOU FIND THE CHANGE IN GRAVITATIONAL POTENTIAL ENERGY? | Change in gravitational potential energy= mass x gravity x change in height |
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