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Does not multiply energy. Work done or energy used (force * distance) remains the same at both ends. Force or torque can be increased or decreased depending on mechanical advantage. It can change the direction of the force or torque.
Actually, pulleys cannot multiply effort force. It can only change the direction of the effort force.
a machine helps us do work because it can a)multiply force, b)multiply distance, or c)change the direction of force.
In order to change direction, the applied force (represented as a Vector) must change DIRECTION. A change in magnitude of the Force is not necessary.
Pulleys change the direction of a force.
Change the direction of force and multiply the force.
Does not multiply energy. Work done or energy used (force * distance) remains the same at both ends. Force or torque can be increased or decreased depending on mechanical advantage. It can change the direction of the force or torque.
Actually, pulleys cannot multiply effort force. It can only change the direction of the effort force.
a machine helps us do work because it can a)multiply force, b)multiply distance, or c)change the direction of force.
Force
In order to change direction, the applied force (represented as a Vector) must change DIRECTION. A change in magnitude of the Force is not necessary.
Pulleys change the direction of a force.
The answer is force because Force is needed to change the direction of a moving mass.
Machine
Force changes either the speed or the direction of motion, or both.
when it changes its direction
A Pulley is basically a kind of lever that can be used to change the direction of a force. Properly used, a pulley or system of pulleys can multiply forces