Available Answers

1. 1.

   Answer in Yes or No.

   1. A bicycle is a simple machine.
   2. A lever has three points-Load, Effort, Fulcrum.
   3. In a first class lever, the effort is between the load and the fulcrum.
   4. A sewing machine has a wheel and an axle.
   5. Simple machine use a simple force.
2. 2.

   Underline the odd one out. Discuss the reason.

   1. Screw, Ramp, Screw of a cap, Screw jack.
   2. Knife, Blade, Screw, Tin cutter
   3. Flag pole, Curtain string, Well, Knife
   4. Sewing Machine, Cycle, Slide, Grinding machine
3. 3.

   Complete the flow chart given below.

   

4. 4.

   Choose the correct answer.

   1. an example of the inclined plane is a _______________.
      1. well
      2. sewing machine 
      3. ramp
   2. A cutting knife is an example of a _______________.
      1. wheel and axle
      2. wedge
      3. lever
   3. Wheels with teeth are called _______________.
      1. pulleys
      2. strings
      3. gears
   4. A fishing rod is an example of _______________.
      1. first class lever
      2. second class lever
      3. third class lever
   5. The position of load in a third class lever is _______________.
      1. between fulcrum and effort
      2. before the effort
      3. on the same side of the fulcrum
5. 5.

   Name the simple machine associated with the following.

   1. Axe
   2. Nail cutter
   3. Tongs
   4. Flagpole
   5. Pen cap
6. 6.

   What are simple machines? How do they help us?