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Pulley can prove that simple machine changes the direction of effort.
Simple
Simple
It is a device that can store elastic energy. It is not a machine, which changes force and distance and/or direction.
An inclined plane (ramp).
Levers, inclined planes, and compound pulleys all do that.
A straw is not a simple machine. Simple machines are mechanical devices that change the direction of a force. A straw does not redirect the direction of the force.
An axel is a simple machine that relies on change in direction to make work easier. Furthermore, a simple machine is a device that makes work easier by increasing force or changing the direction of a force without electricity or other power sources.
simple machines like pulley, liver and fulcrum.
It changes the direction of the input force only
yes
machineAre you referring to simple machines?wikipedia.org/wiki/Simple_machinemachine