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Work & Simple Machin
Work & Simple Machines
| Question | Answer |
|---|---|
| An 100 watt light bulb has more __________ than a 60 watt light bulb. | power |
| Power is the amount of _________ per unit of time. | work |
| The unit of power is equal to one _________ per second. | joule |
| __________ is the rate at which work is done. | Power |
| Work / time = | power |
| Electrical appliances are rated in _________. | watts |
| Power can be calculated by multiplying force X distance, then dividing by ______. | time |
| When the _____ of doing work increases, power increases. | time |
| 150 watt bulb does 150 _______ per second. | joules |
| If time and force remain the same, power is increased when the _______________ increases. | distance |
| ________ is the transfer of energy that occurs when a force is applied over a distance. | Work |
| A force that does not make the object move, does _________. | not work |
| Work is done on an object if how many things happen? | 2 |
| Work is done if... Part 1 - The object _______ as the force is applied. | moves |
| Work is done if... Part 2 The direction of the applied force is the _____ as the direction of motion. | same |
| The distance in the work equation is the __________ the object moves as the force is acting on it. | distance |
| The work done on an object depends on the ___________ of the force applied and the direction of __________. | direction, motion |
| The work done to lift any object is equal to the ______ of the object X the _______ it is lifted. | weight, distance |
| Force X distance = | work |
| The force must be in ___________ and the distance must be in _________. | Newtons and meters |
| Like other types of energy, work is measured in __________. | joules |
| The joule is the SI unit of work and ________. | energy |
| Part 1 The amount of work done to push an object up a hill is the same as the amount of work done to lift the object directly to the top of the hill. | It takes less force to push an object up the hill but the distance is greater than lifting it straight up. |
| Part 2 The amount of work done to push an object up a hill is the same amount of work done to lift the object directly to the top of the hill. | It takes more force to lift an object straight up, but the distance is less than pushing it up a hill. |
| Doing work on an object ________ to the object. | transfers energy |
| Work is done when you lift an object and also ___________ the object's energy. | increases |
| Work done is in ________ and time is in ________. | joules and seconds |
| The SI unit of power is the __________. | watts |
| One ________ = one watt | j/s |
| You can increase power by _____________ the amount of time it takes to do a certain amount of work. | decreasing |
| You can think of power as the rate at which energy is _________ to an object. | transferred |
| Doing work more quickly does affect _________, the rate at which work is done. | power |
| You can calculate power by ___________ the work by the time needed to do the work. | dividing |
Created by:
Jon19707