Simple Machine Pop Quiz

Isla is trying to understand how a simple machine works. A simple machine is defined as a mechanical device that

• does valuable work by changes the direction and magnitude of the force.

• does simple work.

• makes life easier.

• makes complex tasks easier by doing all the work.

Evelyn is trying to understand how a compound machine works in her science class. She learns that a compound machine is defined as

• a complex machine that does simple tasks.

• a machine that makes complex tasks easier.

• a combination of two or more simple machines.

• a machine that does the work efficiently.

During a science class, Aria asked her classmates to list the six types of simple machines they learned about.

Answer explanation

Wheel & Axle, Pulley, Lever, Wedge, Screw and Inclined Plane.

During a science class, Abigail asked, "Which of the following is an example of a compound machine?"

• a lever

• a bicycle

• a pulley

• a wedge

Daniel is trying to lift a heavy box using a lever. What is the primary purpose of using this simple machine?

• To perform complex tasks with ease.

• To reduce the amount of force needed to perform work.

• To increase the speed of work done.

• To make machines more complicated.

Noah was trying to lift a heavy rock using a stick. He wondered how a lever can help him in this situation.

Answer explanation

A lever is a straight or curved rigid bar that is free to turn about a fixed point.

During a physics class, Arjun asked, "What are the three classes of levers?"

During a science class, Kai asked, "Which of the following is NOT a type of simple machine?"

• a lever

• a wheel and axle

• a gear

• a circuit

Anika is trying to understand how a pulley works in her physics class. A pulley is defined as a

• a wheel on an axle with a rope or cable passing over the wheel to move and change direction.

• a simple machine that uses a rope to lift heavy objects.

• a rope wrapped around a wheel with an extension.

• grooved wheel that turns around an axle held in place by a mounting bracket.

An _ is a flat, slope/slanted surface tilted at an angle connecting a lower level with a higher level.