Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 17 - Ai Robogenius
P. 17

    ECOTECH       Electric  cars use  electricity  to  run. They are better  for the  environment
                      ENERGY        because they don't pollute the air with smoke.

                        «    A machine is a tool that helps people do work easily.

                        «    A simple machine is a tool that helps you to lift, push, pull or
                            move things.

                        «    A lever is a simple machine that helps us lift or move things easily.
                        «    A pulley is a wheel with a rope around it. It helps us lift or move things easily.

                        «    An inclined plane is a flat surface that is slanted.

                        «    A wheel and axle has a big wheel and a small rod (axle) in the center.
                        «    A wedge is a simple machine that has a sharp edge. It is used to cut, split or shape
                            objects. For example, a knife cuts fruits and vegetables and an axe splits wood.

                        «    A complex machine is made up of two or more simple machines that work together
                            to make a task easier.

                        «    An escalator is a complex machine that uses pulleys and inclined planes to move
                            people up and down safely and easily.

                        «    A wheelbarrow uses a wheel and axle to move loads easily and a lever to lift heavy
                            materials with less effort.

                                                               ROBO CHECK

                     A. Tick ( ) the correct option.

                        1.  Select the simple machine used in a see-saw.

                                   (i)  Pulley                               (ii)  Lever

                                   (iii)  Inclined plane                     (iv)  Wedge

                        2.  Which of the following is an example of a simple machine?

                                   (i)  Bicycle                              (ii)  Scissors

                                   (iii)  Pulley                             (iv)  Crane

                                                                                 Simple and Complex Machines
                                                                                                                        15

| 12 13 14 15 16 17 18 19 20 21 22 |