Question

Which of the following statements are true about an ideal single fixed pulley.

• A. it changes the direction of the force.
• B. it changes the magnitude of the force
• C. its mechanical advantage is $2$
• D. it is not a simple machine

Answer 1

The correct option is A

it changes the direction of the force.

A pulley is used for lifting up a load by applying the effort downwards. To raise the load, the load is attached to one end of the string and the effort is applied at the other end by pulling it in the downward direction. A pulley helps us apply the force in a convenient direction and hence is used to change the direction of the force.