Understanding Simple Machines

What is the purpose of simple machines?

• To increase the effort needed

• To make work easier

• To complicate tasks

• To consume electricity

What does a lever use to lift a load?

• A screw

• A motor

• Electricity

• A fulcrum

How does an inclined plane make moving objects easier?

• By decreasing the slope

• By increasing the distance over which force is applied

• By reducing distance

• By increasing weight

What is a common example of a screw in everyday objects?

• A light bulb

• A wedge

• A lever

• A pulley

What does a pulley system do to the direction of the force applied?

• Changes it

• Reduces it

• Increases it

• Nullifies it

What is the primary use of a wedge?

• To roll objects

• To lift objects

• To hold objects together

• To separate objects

How do your teeth function as a simple machine?

• As a lever

• As a pulley

• As a wedge

• As a wheel and axle

What simple machine is central to the operation of a car?

• Pulley

• Wheel and axle

• Wedge

• Screw

What does a wheel and axle reduce when moving a load?

• Efficiency

• Force

• Distance

• Speed

Why is it important to recognize simple machines in our environment?

• To improve efficiency in tasks

• To understand physics

• To use more electricity

• To make work harder