aaronpmoore4137
21.11.2019 •
Physics
If a resource is nonrenewable, it
a) exists in unlimited quantities
b) can be replaced within 100,000 years
c) exists in limited quantities
d) can be replaced within 10 years
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Ответ:
The wheel and axle is a simple machine that reduces the friction involved in moving an object, making the object easier to transport. ... Once the object is moving, the force of friction opposes the force exerted on the object. The wheel and axle makes this easier by reducing the friction involved in moving an object.
In addition to reducing friction, a wheel and axle can also serve as a force multiplier, according to Science Quest from Wiley. If a wheel is attached to an axle, and a force is used to turn the wheel, the rotational force, or torque, on the axle is much greater than the force applied to the rim of the wheel.