Exploring Simple and Compound Machines

Which of the following is a type of simple machine?

• Lever

• Engine

• Battery

• Computer

What is the main purpose of a pulley system?

• To make work harder

• To change the direction of a force and make lifting easier

• To create electricity

• To store energy

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Which of these is an example of a compound machine?

• Scissors

• Wheelbarrow

• Inclined plane

• Pulley

What is gravity?

• A type of simple machine

• The force that pulls objects toward the Earth

• A kind of energy

• A tool for measuring work

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Which of the following is NOT a simple machine?

• Wedge

• Screwdriver

• Pulley

• Television

Which simple machine is used to hold things together or lift objects by turning?

• Screw

• Lever

• Wheel and axle

• Wedge

If you use a ramp to move a box into a truck, which simple machine are you using?

• Pulley

• Inclined plane

• Lever

• Wedge

Which of these is a real-world example of a lever?

• Doorstop

• See-saw

• Light bulb

• Rope

Which statement best describes mechanical advantage?

• The amount of energy used by a machine

• How much a machine multiplies your force

• The speed of a machine

• The weight of a machine

How does a wheel and axle make work easier?

• By increasing the amount of force needed

• By reducing friction and making it easier to move objects

• By making objects heavier

• By stopping movement