Which is the best example of forces acting in the same direction? a boy lifting his chest off the ground during a pushup two football players pushing a tackling sled a person pulling out a garden hose from its reel two dogs playing tug-of-war with a rope
Answers
A boy lifting his chest off the ground during a push up is the best example of forces acting in the same direction.
Muscles, bones, and joints are a number of the maximum exciting programs of statics. There are a few surprises. Muscles, for example, exert a long way more forces than we'd think. Figure 1 suggests a forearm keeping a ee-e book and a schematic diagram of an identical lever system. The schematic is a superb approximation for the forearm, which appears greater complex than it is, and we will get a few perception into the manner ordinary muscle structures characteristic through studying it.
Muscles can handiest contract, in order that they arise in pairs. In the arm, the biceps muscle is a flexor—that is, it closes the limb. The triceps muscle is an extensor that opens the limb. This configuration is ordinary of skeletal muscle groups, bones, and joints in human beings and different vertebrates. Most skeletal muscle groups exert plenty large forces inside the frame than the limbs observe to the out of doors world. The motive is obvious as soon as we comprehend that maximum muscle groups are connected to bones through tendons near joints, inflicting those structures to have mechanical blessings plenty much less than one. Viewing them as easy machines, the enter pressure is plenty more than the output pressure.
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Answer:
Explanation:
The best illustration of forces working in the same direction is a boy pushing up while raising his chest off the ground.
One of the most fascinating areas of statics is the study of muscles, bones, and joints. A few surprises are present. For instance, muscles exert much greater forces than we would anticipate. Figure 1 depicts a forearm holding an electronic book and a schematic for a similar lever mechanism. The schematic is a terrific representation of the forearm, which looks more complicated than it actually is, and by examining it, we can gain some insight into how typical muscle structures behave.
Because muscles can only contract in pairs, they always appear in pairs. The biceps muscle in the arm is a flexor—that it causes the limb to shut. The triceps muscle extends the limb as an extensor. This arrangement of bones, joints, and skeletal muscle groups is typical in humans and other vertebrates. The majority of skeletal muscle groups produce much greater forces inside the body than the limbs do outside. The reason becomes clear if we realise that most muscle groups are attached to bones through tendons close to joints, causing such structures to have much less mechanical benefits than one. The entrance pressure is far higher than the output pressure when looking at them as simple machines.
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