Mechanical ComprehensionQuestion 96 of 120
A pulley system is used to:
a.create electricity
b.reduce friction to zero
c.increase temperature
d.change the direction of a force
Explanation
A single fixed pulley lets you pull down to lift a load up, changing the direction of the applied force. Adding more pulleys can also reduce the effort needed.
Practice all 120 questions free — no signup required.
Related questions on this topic
- Which simple machine is a doorknob an example of?
- A lever is used mainly to:
- If two people push on a box from opposite sides with equal force, the box will:
- Which of these is an example of an inclined plane?
- The force that opposes the motion of two surfaces sliding against each other is:
- In a class-one lever, the fulcrum is located:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against ASVAB (Armed Services Vocational Aptitude Battery) · How we review