Available Answers

1. 1.

   Give instances from your daily life where you use force?

   1. Lifting your school bag.
2. 2.

   Fill in the blanks.

   1. Force changes the _______________ of the motion.
   2. _______________ and _______________ forces are contact forces.
   3. The force between electrical charges in called _______________ force.
   4. The effect of force is greater if the area is _______________.
   5. It is not easy to cut a fruit with a _______________ knife.
3. 3.

   Tick (√) the correct option.

   1. The weight of an object is due to
      1. force of gravity
      2. friction
      3. magnet
      4. electrostatic force
   2. Pressure is equal to
      1. force/volume
      2. force x area
      3. force x volume
      4. force/area
   3. Force will not affect the
      1. speed of motion
      2. direction of motion
      3. shape of the object
      4. mass of the object
   4. A plastic comb attracts small pieces of paper due to
      1. gravitational force
      2. electrostatic force
      3. magnetic force
      4. all of these
4. 4.

   Match the columns.

   COLUMN A	COLUMN B
   1. Magnet	a. Force between electric charges
   2. Pascal	b. Attracts iron nails
   3. Gravitational force	c. Force per unit area
   4. Pressure	d. Planets around the sun
   5. Electrostatic force	e. Unit of pressure

    

5. 5.

   Write one word for the following.

   1. An instrument used to measure atmospheric pressure
   2. SI unit of force
   3. A force that attracts iron objects
   4. Force per unit area
6. 6.

   What is force? Write any two effects of force.