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A skydiver experiences two forces when in freefall. One is gravity, which he has no control over. The other is air resistance, a type of fluid friction. By changing the position of his dive relative to his direction, a skydiver can fall faster or slower, spin, etc. By spreading his limbs out and assuming a laying position in the air he would produce the most air resistance and slow his descent. At some point, however, the parachute (also causing air resistance) would be deployed and slow him further.
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BlakeA skydiver can use friction by adjusting the position of their body to increase surface area and create more drag. By spreading out their limbs, the skydiver can encounter more air resistance, which helps to slow down their descent speed. This increase in friction allows the skydiver to control their rate of descent and eventually deploy their parachute safely.
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Friction is both friend and foe?
Friction can be considered a friend because it allows us to walk, drive cars, and hold objects. It provides the necessary grip and traction for various activities. However, friction can also be seen as a foe because it can slow us down, cause wear and tear on machinery, and reduce energy efficiency.
What three ways can friction be useful?
Friction allows us to walk without slipping by providing grip between our feet and the ground. It helps to slow down moving objects, such as vehicles coming to a stop on a road. Friction is essential for writing with a pencil, as it allows the graphite to leave marks on paper.
What way is friction helpful?
Friction is helpful because it allows us to walk, hold objects, and drive vehicles by providing the necessary grip or traction. It also helps to slow down moving objects and prevent them from sliding or slipping. Additionally, friction plays a crucial role in many mechanical systems by helping to transfer force and transmit power.
What is the magnitude of the force of gravity on the skydiver with 845 N?
If you're telling us that the skydiver weighs 845 newtons, then that's the magnitudeof the forces of gravity between him and the Earth whenever he's near the Earth.
Why is friction sometimes necessary?
Friction is necessary in many situations to provide traction, allowing us to walk, drive, or grip objects. It is also important for braking systems, as it helps slow down moving objects by converting kinetic energy into heat. In some cases, controlled friction is necessary for tasks like writing with a pen or playing musical instruments.
