Available Answers

1. 1.

   Multiple choice questions.

   1. Which of the following is not a part of a lever?
      1. Fulcrum
      2. Load
      3. Effort
      4. Axle
   2. A bottle opener is an example of a:
      1. first class lever
      2. second class lever
      3. third class lever
      4. screw
   3. When the effort is in between the fulcrum and load, it is a:
      1. inclined plane
      2. third class lever
      3. second class lever
      4. first class lever
   4. A small wheel with a groove around its outer edge is called a:
      1. lever
      2. screw
      3. wedge
      4. pulley
   5. A fixed pulley is used for:
      1. drawing water
      2. drawing curtains
      3. both (a) and (b)
      4. none if these
2. 2.

   Fill in the blanks.

   wheel and axle, direction, compound, third, wedge

   1. A fixed pulley makes our work easier by changing the _____________ of the force.
   2. Forceps are an example of _____________ class lever.
   3. A _____________ is made of two inclined planes placed together in a 'V' shape.
   4. Bicycles, clocks and watches are examples of _____________ machines.
   5. A potter's wheel is an example of _____________.
3. 3.

   Name five simple machines.

4. 4.

   What is lever? Write its types.

5. 5.

   Explain the use of a wheel and axle machine.

6. 6.

   Write two uses of a wedge.