Define pulley. there is no mechanical advantage of a single pulley. why is it called a machine a all? (plzz answer fast it's urgent then I will give you 100pts)
Answers
Define pulley??
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt.
there is no mechanical advantage of a single pulley.why is it called a machine a all?
There is no gain in mechanical advantage in the case of a single fixed pulley. A single fixed pulley is used only to change the direction of the force applied that is with its use, the effort can be applied in a more convenient direction. To raise a load directly upwards is difficult that is why they are called machines.
"(plzz answer fast it's urgent then I will give you 100pts)"
at least a like and 5 stars!!
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt. In the case of a pulley supported by a frame or shell that does not transfer power to a shaft, but is used to guide the cable or exert a force, the supporting shell is called a block, and the pulley may be called a sheave.