Available Answers

1. 1.

   Explain giving two examples each of :

   1. Contact forces, and
   2. Non-contact forces.
2. 2.

   Classify the following amongst contact and non-contact forces :

   1. frictional force,
   2. normal reaction force,
   3. force of tension in a string.
   4. gravitational force,
   5. electrostatic force,
   6. magnetic force.
3. 3.

   Give one example in each case where :

   1. the force is of contact, and
   2. force is at a distance.
4. 4.

   A ball is hanging by a sting from the ceiling of the roof. Draw a neat labelled diagram showing the forces acting on the ball and the string.

5. 5.

   A spring is compressed against a rigid wall. Draw a neat and labelled diagram showing the forces acting on the spring.

6. 6.

   A wooden block is placed on a table top. Name the forces acting on the block and draw a neat and labelled diagram to show the point of application and direction of these forces.