Available Answers

1. 1.

   Fill in the blanks:

   1. In a lever of second order ___________ lies in the centre.
   2. A push or a pull applied on an object is called ___________.
   3. A road up the hill is an ___________.
   4. A ___________ is a modified form of inclined plane which has a circular motion.
   5. Any tool having a sharp edge and a blunt edge is known as a ___________.
   6. The direction of applied force can be changed by a ___________.
   7. A wheel is always ___________ in shape.
2. 2.

   Why do carpenters prefer screws as compared to the nails?

3. 3.

   Give any three examples where wedge acts as a machine.

4. 4.

   Define lever of the first order.

5. 5.

   Define lever of the second order.

6. 6.

   Define lever of the third order.