Available Answers

1. 1.

   Choose and write the correct answer (MCQs):

   1. There is on force which is exerted by all matter on all other matter, which force is this:
      1. frictional force
      2. magnetic force
      3. electrostatic force
      4. gravitational force
   2. It is difficult to walk on ice because:
      1. friction is low
      2. friction is high
      3. pressure is low
      4. pressure is high
   3. Friction is:
      1. always an advantage
      2. always a disadvantage 
      3. neither a disadvantage 
      4. sometimes a disadvantage and sometimes an advantage
   4. Little bits of paper get attracted to the plastic ruler. It is the example of:
      1. muscular force
      2. magnetic force
      3. electrostatic force 
      4. gravitational force
   5. An apple falls to the ground , due to:
      1. gravity
      2. magnetic force
      3. frictional force
      4. electrostatic force
2. 2.

   Fill in the blanks:

   1. Force is associated with _____________ or _____________ result in the motion of a body.
   2. Force applied on an object in the same direction ____________ to one another.
   3. The force resulting due to the action of muscles is known as the ___________.
   4. The force of ____________ is the responsible for changing the state of motion.
   5. The force exerted by magnets on each other and on some metals is known as ____________.
   6. _____________ is actually the force of attraction between participles of matter.
   7. The force acting on a unit area of a surface is called ______________.
3. 3.

   Write T for true or F for false:

   1. All pushes and pulls are forces.
   2. Only the earth exerts gravitational force on all objects.
   3. Friction causes wastage of energy.
   4. Atmospheric pressure increases with height.
   5. The force acting on a unit area of a surface is called Newtown.
   6. Gravitational force is an example of contract force.
   7. When we lift a bucket of water, we use gravitational force.
4. 4.

   What is force? Explain the four effects a force can produce, giving relevant examples.

5. 5.

   Describe the kinds of forces and specially the difference between a contact force and a non-contact force.

6. 6.

   How would you demonstrate that water exerts equal pressure in all directions? Explain force? Give one example.