The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ...A. Phelps, 1826 - 312 страница |
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Страница 55
... principle of the mechanical powers . 182. If a man , twice the weight of the boy , go with the same degree of swiftness , or with the same veloci- ty as the boy , he will go against the wall with twice the momentum of the boy in every ...
... principle of the mechanical powers . 182. If a man , twice the weight of the boy , go with the same degree of swiftness , or with the same veloci- ty as the boy , he will go against the wall with twice the momentum of the boy in every ...
Страница 56
... principle , then , of mechanics is this , that we gain in power , what we lose in motion , and hence the strength of one man could move the earth , if he could bring his strength to act upon it with such a velocity , as there is a ...
... principle , then , of mechanics is this , that we gain in power , what we lose in motion , and hence the strength of one man could move the earth , if he could bring his strength to act upon it with such a velocity , as there is a ...
Страница 57
... principle : their power depends on the propor- tion between the height actually attained , and the length of the plane moved over . A screw is an inclined plane ; and if a lever be ad- ded to it as in presses , the power gained is so ...
... principle : their power depends on the propor- tion between the height actually attained , and the length of the plane moved over . A screw is an inclined plane ; and if a lever be ad- ded to it as in presses , the power gained is so ...
Страница 58
... principle of all the mechanical powers , however they may be combined , is the same ; that is to say , to create all the difference possible between the velocity of the power , and the velocity of that body which is to be acted upon ...
... principle of all the mechanical powers , however they may be combined , is the same ; that is to say , to create all the difference possible between the velocity of the power , and the velocity of that body which is to be acted upon ...
Страница 59
... principle remains the same , and it is , perhaps , the greatest dis- covery that was ever made in mechanics . 2. Mr. Watt , of Birmingham , bas made many improve- ments in the steam engine ; and , among others , he fastens the top of ...
... principle remains the same , and it is , perhaps , the greatest dis- covery that was ever made in mechanics . 2. Mr. Watt , of Birmingham , bas made many improve- ments in the steam engine ; and , among others , he fastens the top of ...
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