Simple Machine

Simple Machine

​Machines

​Any device used to make our work easier is called a machine.

Open Ended

Why do we need machines?

​Types of machines

​1. Simple Machine

​2. Complex Machine

Multiple Choice

Which of these is an example of complex machine?

• Lever

• Car

• wheel and axle

• Screw

​Types of simple Machines

​1.Lever

​2.Screw

​3.Pulley

​4.Wheel and axle

​5. Inclined Plane

​6.Wedge

Open Ended

What is lever?

​Lever consist of three parts

​1.Effort

​2. Fulcrum

​

​3.Load

Poll

Lever is of _________ types

• 4

• 2

• 6

• 3

​Lever of first order or Class One Lever

​Fulcrum is between load and effort

Multiple Choice

Which of the following is a class one lever?

• See-Saw

• Scisssor

• Beam Balance

• All

Open Ended

Give one example of lever of first order.

​Lever of second order or Class two lever

Load is located in between the effort and fulcrum

Poll

Wheel barrow is which level lever?

• Class One Lever

• Class Two Lever

• Class Three Lever

Multiple Choice

Which of these is not an example of class two lever

• Can Opener

• Sea saw

• Wheel Barrow

​Lever of Third-Order or Class Three Lever

​Effort is between Load and Fulcrum

Multiple Choice

In which class lever load is loacted between fulcrum and effort

• Class One

• Class Two

• Class Three

Multiple Choice

Fulcrum is loacted between load and effort in ________ order lever

• One

• Two

• Three

Multiple Choice

For third class lever, Which of the following is located in the centre?

• Fulcrum

• Effort

• Load

Open Ended

How arm is an example of Class One Lever?

Poll

Knee joint is an example of which class lever?

• 1

• 2

• 3

Open Ended

How knee joint is an example of class 2 lever?

Draw

Draw an example of screw.