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You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance（距离）.
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance（距离）.
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance（距离）.
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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2. Be careful not____ the ladder.
3. I can't promise, but I____.
4. Mr. Smith needs more exercises____.
5. Mike has only driven to the pub his new car-he usually walks !
6. He_______ what he had done.
7. She's a bravely player; she never _______,
8. He_______ his success more_______ luck than to ability.
9. My friend has gone to another city, but we usually ________.
10. I_______ catch the early train, but I didn't get up in
You have often __1__ people talk about work. Perhaps you have __2__ your friends about how hard you worked to get something done. However, you may have done no work __3_ you think you worked hard.
A boy is pushing a big box very hard, but the box is __4__ heavy for him to move and he may __5__ to push against the box. __6__ the language of science, he has not done __7__ work. Can you think you are working when you are studying or talking?
In science, work is only done when a force(力) moves something that has weight through a distance（距离）.
Work =" force" × distance moved.
__8_ you want to find out whether work is done, _9_ yourself, “Is a push or a pull moving something through a distance?” If your answer is __10_, then work is being done.
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