4781685
Description
Flashcards by luqman osman, updated more than 1 year ago
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Created by luqman osman
over 8 years ago
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| Question | Answer |
| WHAT IS ENERGY? | ENERGY IS THE POTENTIAL POSSESSED BY AN OBJECT DUE TO IT'S POSITION ABOVE THE GROUND, IS THE ABILITY TO DO WORK, AND WORK IS MOVING SOMETHING AGAINST A FORCE LIKE GRAVITY. |
| WHAT IS WORK? | WORK IS THE ENERGY TRANSFERRED BY A FORCE THAT ACTS OVER A CERTAIN DISTANCE;MEASURED IN JOULES(J). |
| WHAT IS THE FORMULA FOR WORK? | W=FXD -WHERE W IS THE WORK DONE -F IS THE FORCE APPLIED -D IS THE DISTANCE MOVED. |
| WHAT IS KINETIC ENERGY? | KINETIC ENERGY IS THE ENERGY OF A MOVING BODY, ENERGY WICH A BODY POSSESSES BY VIRTUE OF BEING IN MOTION. |
| WHAT IS THE FORMULA FOR ENERGY? | EK=1/2MV2 -WHER M IS THE MASS -AND V IS THE SPEED(M/S) |
| WHY IS INCREASED SPEED DANGEROUS? | INCREASE SPEED IS DANGEROUS BECAUSE CARS TRAVELLING AT HIGHER SPEED REQUIRE LONGER DISTANCE TO STOP. |
| WHAT IS POTENTIAL ENERGY? | POTENTIAL ENERGY IS ENERGY THAT AN OBJECT HAS BECAUSE OF IT'S POSITION OR STRUCTURE.. |
| WHAT ARE EXAMPLES OF POTENTIAL ENERGY? | FOR EXAMPLE , CHEMICAL BONDS.POTENTIAL ENERGY IS OFTEN CALLED STORED ENERGY.POTENTIAL ENERGY GIVES OBJECTS THE CAPACITY TO MAKE THINGS HAPPEN, OR TO DO WORK |
| WHAT IS ELASTIC POTENTIAL ENERGY? | ELASTIC POTENTIAL ENERGY IS ENERGY STORED IN A STRETCHED OR COMPRESSED MATERIAL ,SUCH AS A SPRING OR ELASTIC BAND. |
| WHAT IS GRAVITAIONAL POTENTIAL ENERGY? | IT IS THE ENERGY POSSESSED BY AN OBJECT DUE TO IT'S POSITION ABOVE THE GROUND. |
| WHAT ARE EXAMPLES OF GRAVITATIONAL POTENTIAL ENERGY? | FOR EXAMPLE, A TREE BRANCH HAS GRAVITATIONAL ENERGY.IF IT FALLS, IT WILL DO WORK ON ANY CAR IT HITS. |
| WHAT IS THE FORMULA FOR GRAVITATIONAL ENERGY? | Ep=MGH -WHER M IS THE MASS -G IS ACCELERATION -H IS THE HEIGHT |
| WHAT IS THE LAW OF CONSERVATION ENERGY? | THE LAW OF CONSERVATION ENERGY IS THE ENERGY THAT MAY BE TRANSFERRED BUT IS NEVER CREATED OR DESTROYED. |
| WHAT ARE EXAMPLES OF LAW OF CONSERVATION ENERGY? | EXAMPLE: A TENNIS BALL DROPPED FROM A HEIGHT INITIALLY HAS ONLY GRAVITATIONAL POTENTIAL ENERGY.AS IT FALLS , IT'S GRAVITATIONAL POTENTIAL ENERGY DECREASES AND IT'S KINETIC ENERGY INCREASE AND THE BALL SPEEDS UP.JUST BEFORE THE BALL HITS THE GROUND, ALL OF THE ENERGY IT STARTED WITH HAS BEEN CONVERTED INTO KINETIC ENERGY. |
| WHAT IS EFFICENCY? | EFFICIENCY IS A MEASURE OF THE USEFUL ENERGY OUTPUT OF AN ENERGY TRANSFER. |
| WHAT IS POWER? | THE RATE AT WICH WORK IS DONE; MEASURED IN WATTS(W). |
| WHAT IS THE FORMULA FOR EFFICIENCY? | EFFICENCY=USEFUL ENERGY/TOTAL ENERGY X100%. |
| ARE DOGS MORE EFFICIENCY THAN CATS WHEN IT COMES TO EATING FOOD? | YES, DOGS CONVERT 70% OF THEIR ENERGY USED TO WALK INTO FORWARD MOTION. WHILE CATS CONVERT BETWEEN 20-38% OF THE ENERGY USED TO WALK INTO ACTUALLY MOVING FORWARD. |
| WHAT CAN MOUSE TRAP BE CONVERTED TO? | MOUSE TRAP CAN BE CONVERTED IN AN INSTANT INTO KINETIC ENERGY, SOUND ENERGY AND HEAT ENERGY. |
| WHAT HAPPENS WHEN KINETIC ENERGY OF ONE BALL IS TRANSFERRED TO ANOTHER BALL? | If a ball hits a stationary ball, it comes to rest. Then the stationary ball begins to move off. Kinetic energy is said to transfer from one ball to the other. |
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