Module 5 - Simple Machines

Which situation shows the use of a simple machine?

• A. A girl eats sandwich.

• B. A banker counts money.

• C. A boy runs across a football field

• D. A mother pushes a stroller up a ramp into a building.

Simple machines are simple tools that are found around us. Which is a function of simple machines?

• A. Make our work easier

• B. Make work longer and difficult to do

• C. Changing the force direction is not possible

• D. Increases the effort exerted in doing the task.

Flood-prone areas use inclined plane as ramps in elevated car parks. The following are true about the uses of inclined plane EXCEPT one.

• 1. A. It reduces the effort.

• B. It helps move the weight to a higher elevation.

• C. Ramps and staircase are the examples of inclined plane.

• D.The effort needs to lift or move load can be reduced by moving the fulcrum.

In your art class, your teacher instructs you to cut colored papers into four equal parts. Which among the following will you use?

• A. cutter

• B. hands

• C. pair of scissors

• D. ruler

Which simple machine can be used to lift weight? It has fulcrum, or pivot point, which is located in the center, near or at the end.

• A. cutter

• B. lever

• C. pulley

• D. wedge

A heavy object could be rolled up instead of lifting it straight. Using this simple machine can save effort.What simple machine is this?

• A. lever

• B. pulley

• C. screw

• D. inclined plane

Screws are used to tighten two objects together. Which of the following does NOT describe the screw?

• A. It is fixed and it does not rise or fall

• B. It is a modified version of the inclined plane

• C. Jar lid, drill bit and threads are examples of screw

• D. It is an inclined plane wrapped in a spiral around a post.

Using a wheel and axle makes our work easier. Which of the following demonstrates the use of wheel and axle?

• A. Apples cut into pieces.

• B. Screw driver fastens wood or metal.

• C. A ramp carry heavy objects to higher place.

• D. Using vehicles from primitive times up to the present.

What simple machine combines with itself to make a wedge?

• A. inclined plane

• B. lever

• C. pulley

• D. wheel and axle

Wedge is an example of a simple machine. Which of the following activities will you use wedge to lessen your work?

• A. Using knife to cut big parts of vegetables.

• B. Using a staircase to reach the second floor.

• C. Using a can opener to open the can of sardines.

• D. Using a ramp to park the bicycle into a higher parking place