Simple Machines - Levers

What is a machine in physics?

• A device that creates energy

• A mechanical device that changes the motion of an object

• A tool that stores information

• A system that generates electricity

Which of the following is NOT part of the lever family?

• Simple lever

• Pulley

• Screw

• Wheel and axle

Which simple machine is part of the inclined plane family?

• Pulley

• Wheel and axle

• Wedge

• Simple lever

Which of the following is a characteristic of all levers?

• They have a wheel

• They have a rigid arm that pivots

• They are powered by electricity

• They are made of metal

What is a simple machine?

• A complex electronic device

• A basic machine that makes work easier

• A tool that stores data

• A device that generates light

Which machine is NOT in the inclined plane family?

• Wedge

• Screw

• Pulley

• Simple inclined plane

What is the position of the fulcrum in a first-class lever?

• Between the input force and the output force

• At the end of the lever

• Next to the input force

• Next to the output force

What is an example of a second-class lever?

• Scissors

• Wheelbarrow

• Tweezers

• Fishing rod

What is the mechanical advantage of a third-class lever?

• Greater than one

• Less than one

• Equal to one

• Zero

How do third-class levers multiply force?

• By increasing speed

• By multiplying distance

• By reducing friction

• By increasing weight